Episodes

Self-proclaimed mad scientist, Rintarō Okabe, goes to a seminar on time travel with his friend, Mayuri Shiina. Whilst there, he meets a girl named Kurisu Makise who explicitly states that he had met her 15 minutes ago, despite having never met her before. Later on, Rintarō hears a scream and discovers Kurisu had been stabbed. As he sends a text to another one of his research buddies, Hashida Itaru, Rintarō experiences a strange experience and finds the street he is on has suddenly become deserted and a strange sattelite had crashed into the building he was just in. Later on, whilst fiddling about with their strange remote-controlled microwave, which turns bananas into a gel-like substance, Hashida tells Rintarō that the seminar he supposedly attended was cancelled, much to his surprise. Rintarō later discovers that the text he sent to Hashida had been sent to a week ago, just before encountering Kurisu, who is alive and well. || In the summer of 2010, self-proclaimed mad scientist Okabe Rintarou and his childhood friend Shiina Mayuri go to the Akihabara Radio Kaikan building to attend a seminar on time travel by Doctor Nakabachi. While there, Rintaro meets a girl named Makise Kurisu, who claims to have met him fifteen minutes before despite having never met her himself. Later, after receiving a scrambled video message on his phone, Rintaro hears a scream and discovers Kurisu lying in a pool of blood, indicating that she was stabbed to death. Upon sending an e-mail about the situation to his friend, Itaru "Daru" Hashida, Rintaro feels a strange sensation, before discovering the streets have become vacant and a strange satellite has crashed into the radio building. Later, as Rintaro`s "Future Gadget Laboratory" work on a phone-controlled microwave that turns bananas into gelatinous form, Rintaro is surprised to learn that the seminar he was attending was apparently cancelled, as if it had never taken place. Afterwards, as Rintaro and Daru go to a forum being held, Rintaro discovers the e-mail he sent Daru about Kurisu`s stabbing had arrived three days earlier, before coming across Kurisu, who is alive and well. Source: Wikipedia

Rintarō is surprised that Kurisu is alive, before being humiliated by her during a lecture concerning time travel. After getting some provisions from crossdresser Ruka Urushibara and meeting Suzuha Amane, who gets hired to work part time in the electronic's shop below his apartment, Rintarō investigates the supposedly altered events and learns of a man calling himself John Titor who claims to be a time traveller. Rintarō then discovers the books he had on John Titor had disappeared as if they never existed. The next day, Rintarō encounters a strange woman named Moeka Kiryū who asks for information on a retro PC, which Rintarō gathers from Hashida. Later, whilst testing a banana on their microwave which then disappears, Rintarō and Hashida find the banana reattached to the bunch it came from in its gelled state, before Kurisu appears before them once again. || Surprised to find Kurisu alive, Rintaro is subsequently humiliated by her during a lecture concerning the unlikeliness of time travel. After getting some provisions from the androgynous Urushibara Ruka, Rintaro meets Amane Suzuha, who is hired by his landlord Yuugo "Mr. Braun" Tennouji as a part time assistant in his electronics shop. Later, Rintaro investigates the supposedly altered events and learns that a man calling himself John Titor, who claimed in 2000 that he was a time traveler, has surfaced once more in 2010. Believing this John Titor to be a fake, Rintaro is shocked to find that all evidence of Titor appearing in 2000 have disappeared. The next day, Rintaro encounters a strange woman named Moeka Kiryuu who asks for information on a retro PC model called the IBN 5100, which Rintaro gathers from Daru. Later, as Rintaro and Daru once again experiment with their Phonewave, a banana disappears from the oven and appears reattached to its bunch in gel form, at which point Kurisu arrives at the lab. Source: Wikipedia

Rintarō agrees to let Kurisu look at the mobile microwave on the condition she become a lab member. They discover that Hashida was using the microwave at the time Rintarō sent his text about Kurisu's stabbing. Despite the microwave causing a large electrical discharge when Mayuri opens it in the middle of operating, Rintarō concludes that the mobile microwave is, in fact, a time machine. After hearing about the large hadron collider and micro-black-holes, Rintarō asks Hashida to hack into CERN's network. There, they discover they had already been performing micro-black-hole experiments, kept hidden from the public, which reveals that humans had died during them. || Rintaro agrees to let Kurisu exam their PhoneWave on the condition that she become one of his fellow lab members. Performing another experiment with the PhoneWave, which causes a burst of electricity when Mayuri opens it, Rintaro succeeds in sending another e-mail to the past. This leads Rintaro deduce that their PhoneWave is actually a time machine capable of sending text messages to the past. As Kurisu leaves the lab in denial, Rintaro hears about the Large Hadron Collider and micro black holes and asks Daru to hack into SERN. Later, after hearing from Titor about SERN allegedly creating a dystopian future, Rintaro and Daru learn that SERN have been performing top secret experiments with micro black holes, which have resulted in human deaths. Source: Wikipedia

With further information encrypted in a code that Hashida can't decifer, Rintarō learns from John Titor that he needs the IBN 5100 computer Moeka was looking for to decode it. Whilst doing his laundry, Rintarō runs into Kurisu, who is still in denial about a time machine existing. After Mayuri hears from her co-worker, Feiris Nyannyan, that she knows about the IBN-5100, Rintarō plays a game before learning that the computer is at the shrine where Ruka works. After getting permission to borrow it from Ruka's father, Rintarō and Kurisu carry it back to the lab. || With further information about SERN`s time travel experiments encrypted in a code that Daru can`t decipher, Rintaro learns from Titor that he needs the IBN 5100 computer Moeka was looking for in order to decode it. While out doing his laundry, Rintaro runs into Kurisu, who is still in denial about a time machine existing and tells her about the IBN 5100. As Kurisu hears from a contact about the computer`s capabilities, maid café owner Faris Nyan-Nyan informs Rintaro that her family had donated an IBN 5100 to Ruka`s family shrine. Managing to borrow the IBN 5100 from Ruka`s father, Rintaro and Kurisu carry it back to the lab. Source: Wikipedia

As Rintarō and Kurisu arrive home with the IBN 5100, Suzuha seems to be shocked when she sees Kurisu. As Rintarō gathers some needed parts, he runs into Suzuha again, who warns her to be cautious of Kurisu and acts strangely when a helicopter passes by. After Hashida gets the IBN 5100 working, he, Rintarō and Kurisu begin deciphering SERN's reports. They discover that they had indeed been experimenting with time travel, with their attempts of sending humans back in time resulting in the same jellification Rintarō had performed on the bananas. With this knowledge, Rintarō becomes determined to perfect his Mobile Microwave. || Arriving back at the lab with Rintaro, Kurisu is met with a strange reaction from Suzuha. While the gang gathering parts needed to connect the IBN 5100 with Daru`s PC, Suzuha warns Rintaro to be cautious of Kurisu. Using the IBN 5100 to decipher SERN`s encrypted files, Rintaro, Daru, and Kurisu learn that various people have been found dead in a gel-like state in various points in time as a result of their experiments. Kurisu deduces that the gelatinous state is the result of matter being squeezed at a molecular level whilst passing through the micro black hole. Despite the shock of this news, Rintaro vows to perfect the PhoneWave. Source: Wikipedia

The lab members discuss how to perfect the Mobile Microwave, dubbing messages sent to the past as 'D-Mails'. Further experimenting reveals the various rules concerning D-Mails; being that it can only be sent during a certain time of the day, long messages are split into several smaller mails, and the timer on the microwave determines how far back the message is sent. The next day, Moeka comes round to see the IBN 5100 and, after hearing about the time experiments, is made a lab member. || Dubbing the messages they send to the past as "D-Mails", the group conduct further experiments, deducing the rules and limitations of sending D-Mails. They learn what time they can send messages, how much data can be sent, and how far they can send them back. The next day, Moeka shows up at the lab to see the IBN 5100 and seeks to borrow it from Rintaro. After failing to hide the nature of their experiments from her, Rintaro ends up making Moeka his fifth lab member. Source: Wikipedia

After some improvements are made to the Mobile Microwave, Rintarō decides to experiment changing the past by sending winning lottery numbers to the past. After sending the text, the past is changed to where Ruka has bought a lottery ticket, but Rintarō didn't perform the experiment, with only Rintarō retaining the memory of what had happened, realising time has been put onto a new timeline. Confused as to why only he can remember the previous timeline, Rintarō contacts John Titor, who tells him he may have the power to become a messiah and change the future. || After Daru updates the Phone Microwave`s firmware, Rintaro decides to perform an experiment attempting to change history by sending winning lottery numbers to the past. Upon sending the D-Mail, he experiences a sensation similar to the one he had before the satellite crash. Discovering no one else was aware that the experiment even took place, Rintaro finds his D-Mail had indeed led to Ruka purchasing a lottery ticket, although his own personal error led him to get the number wrong. After a brief encounter with Suzuha, Rintaro deduces that the D-Mail had shifted him to a World Line Ruka had bought a lottery ticket and the D-Mail experiment never took place, explaining everyone`s altered memories. Confused as to why only he can remember the previous World Line, Rintaro contacts Titor, who tells him he may have the power to become a messiah and lead the world beyond the "1% Divergence" point and hence, change the dystopian future. Source: Wikipedia

As Rintarō decides to resume his experiments, Moeka requests to send a D-Mail. As she sends the D-Mail, Rintarō is shifted onto a new timeline where Moeka never came to the lab. The next day, Ruka comes to the lab, asking to send a D-Mail to the past so that he would be born as a girl. They send a D-Mail to Ruka's mother's pager from before he was born, letting her know of an urban legend about how mothers-to-be can affect their baby's gender by eating certain foods. Rintarō moves to a new world line, though he doesn't notice anything particularly different at first. || Rintaro explains the nature of the World Line shift to Daru and Kurisu and how he is the only one who can remember its changes, an ability he refers to as "Reading Steiner". As the experiments resume, Moeka requests to send a D-Mail, which shifts Rintaro to a new World Line where no one else remembers Moeka. The next day, Ruka comes to the lab, asking to send a D-Mail to before he was born so that he would be born as a girl. Using an urban myth about how a diet can affect a baby`s gender before birth, the group send a D-Mail to Ruka`s mother`s pager, sending Rintaro to another world line, although he doesn`t notice any obvious changes. Source: Wikipedia

Okabe is shocked to learn that Akihabara is now devoid of moe culture. He questions Mayuri and Daru about Toranoana and other stores that used to be the city, but Mayuri insists that they never existed in Akiha to begin with. Okabe finds that even May Queen Nyan-Nyan has been replaced. He is awe by just how much one text message changed their world. || Realising the D-Mail Faris sent prevented moe culture from being introduced into Akihabara, he discovers that Ruka`s earlier D-Mail had in fact changed his gender to female. Afterwards, Rintaro talks with Suzuha, who reveals she came to Tokyo to try to find her father, mentioning she will leave if she is unable to find him the next day. Rintaro then establishes her as a lab member and invites her to the lab for a farewell party. While preparing for the party, Rintaro receives a threatening text message telling him that someone is watching him, with a picture of a gelatin treat attached. Later, while shopping with Mayuri, he recalls that his Reading Steiner ability may have first occurred when he was a child. Later that night, Suzuha sends a farewell text to Rintaro, prompting him to send a D-Mail to himself ordering him to convince Suzuha to attend the party and stay in Tokyo. Source: Wikipedia

Rintarō discovers that a television in the electronics shop below the lab is the key to the time slot in which D-Mails can be sent. Kurisu then theorises that it might be possible to send memories back in time in the same manner as D-Mails, effectively allowing people to 'leap' to the past. As Rintarō goes into town with Mayuri to look for parts Kurisu needs, running into Moeka along the way, Suzuha tells Rintarō that Kurisu works for SERN, though Kurisu denies this when asked. Kurisu tells Rintarō about the troubles she has with her father, who grew to hate her when she surpassed him in scientific prowess, though cheers up when Rintarō offers to help them reunite. As Mayuri and Kurisu decide to have a sleepover at the lab, Rintarō receives another sinister text message warning him that he knows too much, later learning that the lab is connected to the SERN network without the lab members' knowing. || Rintaro discovers that a CRT television in the electronics shop below the lab has been serving as the "lifter" from the PhoneWave, as the D-Mails can only be sent when it is turned on. Kurisu then theorizes that it might be possible to send frontal lobe memories back in time through the PhoneWave, allowing the consciousness of a person to "time leap" into the past. As Rintaro goes into town with Mayuri to look for parts Kurisu needs, he explains to her that a time leap may be safer to conduct than simply sending D-Mails due to the nature of chaos theory, as the D-Mails can produce unexpected consequences once sent. They run into Moeka along the way, as well as Suzuha, who tells Rintaro that Kurisu allegedly works for SERN. As Kurisu denies this, she tells Rintaro about the problems she has with her father, who grew to hate her because she surpassed him in scientific prowess. Later on when out shopping, Okabe receives another threatening text message with a picture of a severed doll`s head attached, causing him to return to the lab, fearing for Mayuri`s safety. Later, Daru informs the group that the lab has been connected to the SERN network without them knowing. Source: Wikipedia

With the ability to utilise the LHC, Kurisu completes her 'time leap machine'. However, Rintarō, still tortured by the texts he has received, decides against performing an experiment, instead suggesting they announce it to the public. As the lab members decide to have a party, Kurisu comes into conflict with Suzuha, who claims she is destined to become a SERN spy, but Mayuri manages to calm things down. As a bomb threat is televised, Suzuha, after hearing about the lab's connection to SERN, suspects something is terribly wrong and leaves. Just then, the lab is attacked by a group of armed men, led by Moeka who reveals herself to be from SERN. Demanding Rintarō, Kurisu and Hashida hand over the time machine and come with her, she decides Mayuri isn't needed and kills her. || With the ability to utilize SERN`s LHC to compress memories into D-Mail size, Kurisu completes her time leap machine, capable of sending one`s memories up to two days into the past. However, Rintaro, still disturbed by the threatening texts he has received, decides against using the device, suggesting they instead make their discoveries public. As the lab members decide to have a party, Kurisu comes into conflict with Suzuha, who claims she is destined to become a SERN spy in the future, but Mayuri manages to calm things down between. While a bomb threat is televised, Suzuha, after hearing about the lab`s connection to SERN, flees the lab. Just then, a group of armed men storm the lab led by Moeka, who reveals herself to be a "Rounder" hired by SERN. She orders Rintaro, Kurisu, and Daru to be detained before shooting and killing Mayuri, who she deems is not being necessary. Source: Wikipedia

Right after Moeka kills Mayuri, Suzuha rushes in the lab and creates a distraction, allowing Kurisu to use the time leap machine to send Rintarō back in time to 5 p.m. of the same day. Rintarō drives everyone away from the lab, but wastes most of his time searching for Mayuri. By the time they try to escape the area, the bomb threat has stopped the subway and Mayuri is killed when Moeka runs her over with a car. Rintarō manages to escape the clutches of SERN and leaps to the past again. Using his knowledge of Mayuri's movements from his previous leap, he manages to find her sooner and they visit a different subway station. However, Mayuri dies again when Mr Braun's daughter, Nae, accidentally pushes her in the way of an oncoming train. Devastated, Rintarō vows to keep leaping to the past until he manages to save Mayuri. || Moments after Mayuri`s death, Suzuha rushes in the lab and creates a distraction, allowing Kurisu to use the time leap machine to send Rintaro back in time to 5pm the same day. Rintaro drives everyone out of the lab before frantically searching for Mayuri, during which he receives a call from Kurisu, who deduces that he made a time leap. Finding Mayuri, Rintaro attempts to flee with her to the station, only for the trains to have stopped. When they are both approached by Rounders, they attempt to flee, but Mayuri is once again killed when she is run over by Moeka`s car. Escaping the Rounders` clutches and performing another time leap, Rintaro locates Mayuri earlier and escapes to the subway station. However, Mayuri is killed once again when Yuugo`s daughter, Nae, accidentally pushes her in the path of an oncoming train. Devastated, Rintaro vows to keep leaping to the past until he manages to save Mayuri. Source: Wikipedia

Rintarō makes several time leaps, but no matter what, Mayuri always ends up dying in some way. In one of those leaps, Rintarō calls out Moeka and holds her at gunpoint, making her reveal that SERN have targeted the lab due to the creation of the time machine and their plan to publicly announce it. As Rintarō falls further into despair, Kurisu gets him to reveal what he knows and offers to help him try to save Mayuri. She sends Rintarō to just before she completed the time leap machine, where he tells her past self what he knows. As they discuss what the cause of Mayuri's death could be, they are greeted by Suzuha, who tells them that in order to save Mayuri, they need to find a specific World Line. She takes them to the crashed satellite, which turns out to be her time machine, and reveals she is "John Titor" and has come from the year 2036. || As each of Rintaro`s attempts to save Mayuri keep ending in failure, he learns that from Moeka that the lab was targeted by SERN due to their creation of a time machine and their plan to publicly announce it. Falling into despair over his repeated failures, Rintaro is approached by Kurisu, who gets him to reveal his situation and gives him key trigger phrases to get her past self to cooperate with him. After being sent to just before the time leap machine`s completion, Rintaro manages to obtain Kurisu`s aid before they are both approached by Suzuha. She explains that in order to save Mayuri, they need to escape the "Alpha World Line Attractor Field", where Mayuri is doomed to die, due to the converging nature of world lines, and cross the 1% Divergence point to the Beta World Line, where the outcome might possibly be different. Suzuha then takes Rintaro and Kurisu to the crashed satellite, which turns out to be a time machine, and reveals she is in fact "John Titor" and has come from the year 2036. Source: Wikipedia

Suzuha explains how SERN was able to build a time machine and use it to rule the world in 2036. She explains she plans to travel to 1975 to acquire an IBN-5100, but soon discovers her time machine has broken down as a result of the storm on the night Rintarō stopped her from leaving. Rintarō leaps two days before the completion of the time leap machine in order to get Hashida to help fix Suzuha's time machine, whilst Mayuri suggests they also help find Suzuha's father, using his badge as a clue. Suzuha gives Rintarō her Divergence Meter, which keeps track of the magnitude of differences between timelines, and tells him about how he founded the resistance against SERN in the future. After spending the day searching for Suzuha's father, Suzuha gives her thanks to Rintarō before he receives a lead on Suzuha's father from a badge maker. || Suzuha explains how SERN was able to build a time machine and use it to create a totalitarian world in 2036, stating that she had originally planned to travel to 1975 to acquire an IBN 5100, but made a detour to the year 2010 to look for her father. When she tries to start the time machine, she discovers it has broken down, which Rintaro realizes was a result of the storm on the night he stopped her from leaving. Leaping to two days before the completion of the time leap machine, Rintaro gathers the lab members to inform them of the situation. While Daru is tasked with fixing Suzuha`s time machine, Mayuri suggests that everyone also help Suzuha find her father, using a pin badge he gave her as a clue. Suzuha also gives Rintaro a device called the Divergence Meter, which keeps track of the magnitude of differences between World Lines, and tells him about how he founded the resistance against SERN in the future. After spending the day searching for Suzuha`s father, Rintaro is thanked by Suzuha before receiving a lead on Suzuha`s father from a badge maker. Source: Wikipedia

Unable to get much information about the badge maker's client, Rintarō decides to leap back in time to confront the client in question, only to find it was Hashida, who wanted to make a fake badge to cheer Suzuha up. Hashida then mentions that Suzuha's time machine is only able to travel backwards in time. As the repairs to the time machine are completed, Mayuri deduces from the time machine's naming convention that Suzuha's father is actually Hashida. After a short reunion, Suzuha travels back to 1975, though Rintarō notices the Divergence Meter's reading hasn't changed. Later, Mr. Braun delivers a letter from Suzuha from the year 2000, mentioning that she commited suicide a year later. In the letter, Suzuha laments that she failed her mission, as the damaged time machine caused her to lose her memories for 24 years. Rintarō blames himself for stopping her on the night of the party and, despite Mayuri's pleas, sends a D-Mail that stops him from following Suzuha, letting her use the time machine before it was damaged. Speaking with Mr. Braun again, Rintarō learns that Suzuha has died of illness instead, leaving behind her Divergence Meter. Noticing a small change in divergence, Rintarō returns home and finds Mayuri has not been killed by Moeka. || Unable to get much information about the badge maker`s client, Rintaro decides to leap back in time to confront the client in question, only to find it was Daru, who wanted to make a fake badge to cheer Suzuha up. Daru then reveals that Suzuha`s time machine is only able to travel backwards in time, meaning they won`t be able to see her again once she leaves. As the repairs to the time machine are completed, Mayuri deduces from the time machine`s name that Suzuha`s father is actually Daru. After a short reunion, Suzuha travels back to 1975, though Rintaro notices the Divergence Meter`s reading has not changed. A few hours later, Yuugo delivers a letter written by Suzuha in the year 2000, revealing that she had committed suicide a year later. In the letter, Suzuha laments that she had failed her mission, as the damages to the time machine caused her to crash and lose her memories for 24 years. Blaming himself for stopping Suzuha on the night of the storm that damaged the time machine, Rintaro sends a D-Mail that stops him from following Suzuha, letting her use the time machine before it was damaged. Speaking with Yuugo again in the new World Line, Rintaro learns that Suzuha had died of illness instead and receives her Divergence Meter, which is now showing a different value. Source: Wikipedia

Despite the change in divergence, Mayuri's death still takes place, albeit a day later than in previous timelines. Rintarō asks for Kurisu's help, who theorises that, since negating Rintarō's D-Mail about Suzuha delayed the attack, undoing the effects of the other D-Mails could bring them back to a World Line where they have an IBN-5100, letting them hack into SERN and delete the records that set them on Rintarō's trail. Rintarō starts by trying to figure out how to reverse Rumiho's D-Mail, while helping her evade a rival gaming gang. Rintarō takes Rumiho to the place where her maid cafe used to be and tells her about the way Akihabara was. Rumiho comes to remember the previous timeline and the D-Mail she sent: a fake ransom note, which prevented her father from boarding a plane fated to crash. The rival gang catches up to them but they are rescued by the arrival of Rumiho's father. Speaking to him, Rintarō learns that Suzuha gave him the IBN-5100, but he was forced to sell it in order to pay for the fake kidnapping's ransom. After accepting the reality of her father's death, Rumiho agrees to send a D-Mail cancelling out her previous one, turning Akihabara back into a moe hub. The IBN-5100, however, still remains out of reach. || Despite the change in divergence, Mayuri`s death still takes place, albeit a day later than in the previous World Line. Kurisu theorize that, since negating Rintaro`s D-Mail stopping Suzuha delayed the attack, undoing the effects of the other D-Mails could bring them back to a World Line where they have an IBN 5100, allowing them to hack into SERN and delete the records that set them on their trail. Rintaro starts by trying to figure out how to reverse Faris`s D-Mail. After helping her evade a rival gang of Rai-Net players, Rintaro takes Faris to the place where her maid café used to be and tells her about the way Akihabara was. This causes Faris to recall some of her memories from that World Line and the D-Mail she sent: a fake ransom note, which prevented her father from boarding a plane fated to crash. The rival gang catches up to them but they are rescued by the arrival of Faris`s father. Speaking to him, Rintaro learns that he was forced to sell the IBN 5100 he had in order to pay for the fake kidnapping`s ransom. After accepting the reality of her father`s death, Faris agrees to send a D-Mail cancelling out her previous one, turning Akihabara back into a moe hub. The IBN 5100, however, still remains out of Rintaro`s reach. Source: Wikipedia

Rintarō tells Ruka about how she used to be a man and urges her to reverse the D-Mail responsible in order to change Mayuri's fate. While she initially disbelieves him, ultimately she agrees, on the condition that Rintarō takes her on a date. Despite Kurisu and Hashida's advice on dating, Rukako and Rintarō spend the evening in awkward conversation. Like Rumiho, Ruka eventually recalls the previous timeline, which makes her even more depressed at the impending return to it, since she feels she will be unable to pursue her feelings about Rintarō as a guy. Before sending the D-Mail that will cancel out Ruka's first one, Rintarō realises that the reason she didn't enjoy their date was that he was trying to be someone he's not. He visits the shrine and tells her that, no matter what, she'll always be his "student". With their relationship repaired, the world line shifts, turning Ruka back into a guy and leaving only one more D-Mail to be reversed: Moeka's. || Rintaro tells Ruka about how she used to be a male and urges her to reverse the D-Mail responsible in order to change Mayuri`s fate. While she initially doesn`t believe him, she later agrees to do so on the condition that Rintaro takes her on a date. Despite Kurisu and Daru`s advice on dating, Rintaro and Ruka spend their date together in awkward conversation. Like Faris, Ruka eventually recalls the previous World Line where she was a male, distressing her as a return to it would prevent her from pursuing her feelings for Rintaro. Before sending the D-Mail that would negate Ruka`s first one, Rintaro realizes that the reason they did not enjoy their date was that he was trying to be someone he was not. As a result, Rintaro returns to the shrine and spends the rest of the day training with Ruka like they used to. With their relationship repaired, Rintaro sends the D-Mail, moving back to a World Line where Ruka is a boy, leaving the next D-Mail to be reversed: Moeka`s. Source: Wikipedia

As Kurisu offers to look after Mayuri at a doujin convention, Rintarō heads to Moeka's address, only to learn that she had killed herself. After finding out the deadline of Mayuri's death in this world line, Rintarō time leaps to before Moeka killed herself, finding her in a nervous wreck having not been contacted by someone known as 'FB'. Rintarō steals Moeka's phone and sends a D-Mail from it, but the timeline doesn't shift, leading him to realise that another message was sent from her phone. Rintarō confronts Moeka about FB and tells her about her future suicide. Rintarō finds the offending mail, which involved the location of the IBN-5100, but sending a D-Mail from that phone doesn't affect the world line. As Rintarō decides he needs to send a D-Mail from FB's phone, Moeka tells him the location of the IBN-5100. || Arriving at Moeka`s apartment only to learn that she committed suicide, Rintaro leaps to an earlier time, finding Moeka to be a nervous wreck due to not having been contacted by a person known as FB, who had given her the orders to find the IBN 5100. Rintaro steals Moeka`s phone and sends a D-Mail from it, but discovers that she had lied about the contents of the message she had sent in the previous World Line. Confronts Moeka about FB and tells her about her future suicide, Rintaro finds the offending text, which involved the location of the IBN 5100, but annulling it via another D-Mail still does not change the World Line. As Okabe realises he needs to send a D-Mail from FB`s phone in order to convince her past self to follow its instructions, Moeka, feeling betrayed by FB for not contacting her, tells him where to find the IBN 5100. Source: Wikipedia

Despite Rintarō knowing the location of the IBN-5100, Kurisu is against him trying to steal it, as it most likely won't affect the world line. Instead, she suggests to Rintarō that he stake out the location in order to find FB, with Moeka deciding to join him. As they observe the IBN-5100 being taking out, they follow it as it is passed along to several people, including Mr. Braun, before it ends up on a plane towards France. Rintarō, Moeka and Kurisu go to confront Mr. Braun, who reveals himself to be FB, killing Moeka before taking his own life. Rintarō uses Braun's cell phone to cancel out Moeka's D-Mail, returning to a World Line where both Moeka and Braun are alive and he possesses the IBN-5100. As Rintarō gets Hashida to hack into the SERN network to erase the data they have on them, he comes to sudden realisation that he needs to undo an additional D-Mail: the one that prevented Kurisu from getting stabbed. || Despite Okabe knowing the location of the IBN 5100, Kurisu advises against trying to steal it, instead suggesting that he stake out the location in order to find FB, with Moeka deciding to join him. As they observe the IBN 5100 being taken out, they follow it as it is passed along to several people, including Yuugo, before it ends up on a plane bound for France, where SERN is located. Rintaro, Moeka, and Kurisu go to confront Yuugo, who reveals himself to be FB and a Rounder who was forced to do SERN`s bidding to prevent harm from befalling Nae. Following the code of the Rounders for those who fail their mission, Yuugo kills Moeka before taking his own life. Rintaro then uses Yuugo`s cell phone to finally cancel out Moeka`s D-Mail, returning to a World Line where both Moeka and Yuugo are alive and the IBN 5100 is once again in their possession. As Rintaro gets Daru to hack into the SERN network to erase the data they have on them, he comes to the sudden realization that by doing so, he would have to return to a World Line where Kurisu is dead. Source: Wikipedia

Not wanting to move to a World Line where Kurisu dies, Rintarō decides against the hacking. As he accompanies Mayuri to a Comic Market, he tries to think of a way he can save her without changing World Lines, too afraid to tell Kurisu the reason behind his change of plans. As a car appears during Mayuri's fated time to die, Rintarō attempts to change her destiny by letting the car hit him instead, but Mayuri ends up dying trying to save him. After he leaps back in time, Kurisu has Rintarō reveal to her that she dies in the Beta World Line. As Rintarō finds Mayuri visiting her grandmother's grave, he overhears that she's been having dreams of the times she has died, and about how she has noticed Rintarō's suffering. || Not wanting to move to a World Line where Kurisu dies, Rintaro decides against the hacking. Too afraid to tell Kurisu the reason behind his change of plans, Rintaro accompanies Mayuri to a comic market, trying to think of a way he can save her without sacrificing Kurisu. As a car appears during Mayuri`s fated time to die, Rintaro attempts to change destiny by letting the car hit him instead, but Mayuri pushes him out of the way and dies in his place. After he leaps back in time, Kurisu has Rintaro reveal to her that she dies in the Beta world line. Later, Rintaro finds Mayuri visiting her grandmother`s grave, overhearing that she`s been having dreams of the times she has died, and that she has noticed Okabe`s suffering. Meanwhile, Kurisu visits the location where she is destined to die in the Beta World Line. Source: Wikipedia

As Rintarō and Kurisu hide out from the rain, she explains how she recalls her stabbing from dreams, as well as Rintarō's various attempts at saving Mayuri. When Kurisu tells Rintarō that he should save Mayuri over her, he can't accept it and runs off. As Rintarō attempts to time leap again, Kurisu stops him, worried that seeing Mayuri die over and over will destroy him. After giving in and choosing to go save Mayuri, Rintarō tells Kurisu he loves her, to which she responds by kissing him. The next day, Kurisu leaves for Japan, whilst Rintarō and the others delete their data from the SERN network. Just then, Kurisu returns to tell Rintarō she loves him, just before the data deletion takes him to the Beta World Line. After getting rid of the Mobile Microwave, Rintarō receives a call from Suzuha, telling him about World War III. || Kurisu reveals to Rintaro that she recalls her stabbing from dreams, as well as Rintaro`s various attempts at saving Mayuri. When Kurisu tells Rintaro that he should save Mayuri over her, he cannot accept it and runs back to the lab. As Rintaro attempts to time leap again, Kurisu stops him, worried that seeing Mayuri die over and over will destroy him. After giving in and choosing to save Mayuri, Rintaro tells Kurisu he loves her, to which she responds by kissing him. The next day, Kurisu prepares to return to America, while Rintaro and the others delete the original D-Mail from the SERN network. Just after erasing the data, Kurisu returns to the lab to tell him that she loves him, but is cut off as Rintaro shifts back to the Beta World Line. Some time after getting rid of the PhoneWave, Rintaro receives a call from an alternate Suzuha, telling him she needs his help to prevent World War III. Source: Wikipedia

Suzuha explains that her mission is to prevent Kurisu's death and enter a World Line known as 'Stein's Gate' so that World War III will never happen. With a small chance of saving Kurisu, Rintaro agrees to go with Suzuha to just before Kurisu's death. As Rintaro waits in the place where Kurisu's stabbing takes place, he sees Kurisu's father, the Professor Nakamachi he saw that day, attack Kurisu as he tries to steal her time travel theory. As Rintaro attempts to save Kurisu, he inadvertently stabs her himself, allowing Nakamachi to escape with her theory and bring it to Russia. Returning to the present, Rintaro falls into despair but Mayuri knocks some sense into him. Afterwards, Rintaro receives a video mail from his future self, telling him that the key to saving Kurisu without changing the events that led him to create a time machine is to fool his other self into believing Kurisu had died. || Suzuha explains that her mission is to prevent Kurisu`s death and enter a World Line known as Steins Gate, in which World War III never happens. Wanting to save Kurisu, Rintaro travels to the past with Suzuha in her time machine, arriving prior to Kurisu`s death. Witnessing events unfold as they did, Rintaro briefly runs into Kurisu, explaining their prior encounter, before hiding in the room where she will be stabbed. There, Kurisu meets with her father, revealed to be Doctor Nakabachi, who attempts to take ownership of her time travel theory for himself. Rintaro attempts to save Kurisu but inadvertently stabs her himself, allowing Nakabachi to escape with her theory to Russia, an event that will lead to a time machine arms race and eventually, World War III. As Rintaro falls into despair and refuses Suzuha`s offer of a second attempt, Mayuri slaps him, stating that that he was never one to give up on someone or something. Suzuha then reveals that Rintaro was intended to fail the first attempt so that the scrambled video message he received on the day of Kurisu`s death could be made viewable. This turns out to be a video from his future self, explaining that the key to saving Kurisu without changing the events that led him to develop the time machine and causing a paradox is to fool his past self into believing Kurisu has died. Source: Wikipedia

Picking up a sabre toy in order to use its liquid as a substitute for Kurisu's blood, Rintaro and Suzuha return to the day of Kurisu's death. First, he makes sure to obtain a metal toy Mayuri previously found in order to prevent Nakabachi to successfully bring Kurisu's theory to Russia. As he prepares to fake Kurisu's death, Rintaro finds the liquid in the sabre had dried up. To this end, he allows himself to be stabbed by Nakabachi, before knocking out Kurisu with a taser and using his own blood to set the scene up for his past self. As Rintaro returns to the past, Suzuha gives her thanks before time is altered so that the time machine was never invented. In this new timeline, Rintaro goes around giving badges to his past lab members, eventually managing to meet Kurisu once again; she was looking for Rintaro to thank him for saving her life, suggesting that the event of their romance doesn't disappear, either. || Picking up a light up sword in order to use its liquid as a substitute for Kurisu`s blood, Rintaro and Suzuha return to the day of Kurisu`s death. In order to prevent a Metal Upa toy that would prevent Nakabichi`s paper from being destroyed by an on-board fire, Rintaro obtains it himself so that Mayuri ends up with a plastic one, which would later make its way to Kurisu and Nakabichi. Finding that the liquid in the gadget has dried up, Rintaro provokes Nakabachi into stabbing him, leading him to run off in fear with Kurisu`s theory. After knocking Kurisu out with a taser, Rintaro uses his own blood from his stab wound and to recreate the scene he originally saw, fooling his past self and sending him on his time-hopping journey. As Rintaro returns to the present, Suzuha gives her thanks before she disappears, as she does not exist yet in the Steins Gate world line. After recovering his wounds, Rintaro starts giving out badges to the lab members he recruited in other World Lines, saving one for Suzuha, who will be born in seven years. Later, while walking in the streets of Akihabara, Rintaro has a chance encounter with Kurisu, who appears to have retained some memories of the other World Lines. Source: Wikipedia