Staff and directed by Tatsuyuki Nagai, based on the manga of the same name, which in itself is a spin-off of Kazuma Kamachi 's A Certain Magical Index series. The anime series is set in Academy City before and during the events of A Certain Magical Index , in which the plot focuses on Mikoto Misaka , an electromaster who is the third strongest esper in Academy City, along with her friends: Kuroko Shirai, a teleporter and Mikoto's roommate; Kazari Uiharu, Kuroko's partner in Judgment, the city's public safety committee; and Ruiko Saten, Kazari's friend and classmate.
The second season uses six pieces of theme music, two opening theme and four ending themes. For the first sixteen episodes, the opening theme is "Sisters' Noise" by fripSide whilst the main ending theme is "Grow Slowly" by Yuka Iguchi.
The ending theme for episodes 11 and 14 is "stand still" by Iguchi. From Wikipedia, the free encyclopedia. Japanese anime series. Anime News Network. October 21, Retrieved October 22, April 11, Retrieved March 20, February 18, Works by Kazuma Kamachi. Novels Chapters Characters. Hidden categories: Articles with short description Short description matches Wikidata Pages using infobox television season with the season name parameter Articles containing Japanese-language text Episode list using the default LineColor Episode lists with row deviations Articles with Japanese-language sources ja.
Namespaces Article Talk. Views Read Edit View history. Help Community portal Recent changes Upload file. Download as PDF Printable version. Add links. Season 2. List of A Certain Scientific Railgun episodes. While Erii rekindles with Banri, who is undergoing physiotherapy , Mikoto tries to come up with a way to surprise Banri with a present everyone bought for her, only to realize she had left the bag containing the present in Banri's ward.
Just then, a criminal patient that was under watch by the Anti-Skills is broken free by some of his companions and takes Erii as a hostage. They throw Erii off the side of the building in order to break free, but she is saved thanks to Ruiko and Kuroko. Learning that her bag is onboard the fleeing helicopter, Mikoto has Kuroko teleport her to the skies where she destroys the helicopter with her railgun, with Kuroko safely apprehending the culprits.
With the incident dealt with, Banri finally opens her present from everyone, which is a Sakugawa Middle School uniform for her to wear once she recovers.
Mikoto recalls in a dream of how, when she was younger, she was approached by scientists wanting to use her DNA map to help cure Duchenne muscular dystrophy. The next morning, Kuroko tries to take Mikoto through an alleyway to get to the mall, but they encounter a few people passing by. They discover this is due to someone hiding envelopes containing cash cards within the alleyways, piquing people's curiosity to search for them. After running into Ruiko, who is also on the hunt for the money cards, Mikoto overhears some Skill-Outs who have managed to locate the source of the envelopes and decides to follow them.
Meanwhile, Ruiko grows curious as she had allegedly seen Mikoto at the mall, despite Mikoto never actually getting there, with Mii Konori explaining to Kazari about a rumor of there being clones of a Level 5 esper. Things get tense, however, when it appears the Skill-Outs are gradually getting killed off by the girl, who claims to be able to freely kill anyone she has touched. When Mikoto arrives on the scene, the girl, who had simply knocked out all the Skill-Outs using anesthetic and clever acting skills, recognizes her as the "original".
Mikoto is reminded of rumors about there being a clone of her and attempts to question the girl, who was distributing the envelopes in order to fill the alleyways that security cameras cannot reach with human eyes. However, the girl leaves after inadvertently setting the building on fire whilst burning the evidence, simply stating Mikoto is better off not knowing as she would be unable to stop what was happening with her power.
After saving the Skill-Outs, Mikoto looks up for information on the girl, whose name is revealed to be Shinobu Nunotaba , who actually worked at the same medical facility where she had given the scientists her DNA map years ago. Mikoto infiltrates the facility and comes across a room that is separate from the rest of the building's network.
Mikoto hacks into database there and is shocked to learn that the scientists tricked her into giving them her DNA map in order to create clones called "Sisters", known as Project Radio Noise.
However, the project was cancelled when the supercomputer, Tree Diagram, deduced that the clones would not come close to matching Mikoto's level of power. Believing there were not any clones of her after all, Mikoto feels relieved and leaves the facility, unaware of a clone arriving later to delete the database. Three months earlier, in an unknown facility, a pair of women scientists, later recognized as Yumi Kusakabe and Eiga Kanmi, had mentored the birth of a clone of Mikoto, labelled Misaka , installing memory functions via a capsule-like machine called Testament.
Back in the present, Mikoto, who is feeling cheerful with the clone rumors being seemingly debunked, goes shopping with Kuroko and the others at the mall, helping Kazari and Erii buy a rice cooker whilst also picking out things for an upcoming school trip.
The next day, as Mikoto ends up having nothing to do, some young children, including the girl whose bag she previously found, pick up on her boredom and have her play with them. Noticing one of the kids wearing a Gekota badge, Mikoto frantically goes through a whole bunch of capsule vendors in order to win one for herself.
As the day comes to an end, Mikoto suddenly senses a power identical to her own and, upon chasing after its source, comes across Misaka After unwillingly helping her rescue a kitten from a tree, Mikoto tries to question Misaka , but is unable to learn much due to being unable to decipher a codeword. She instead decides to follow her around in case she returns to her base of operations, where they end up doing some surprisingly sisterly activities. Later that evening, as Misaka points out that she is not returning to her point of origin, Mikoto takes her leave after inadvertently giving her the Gekota badge she won earlier.
After receiving some help from Kazari in deciphering the codeword she was told about, Mikoto is horrified to learn of Project Level 6 Shift, in which 20, Sisters from Project Radio Noise are to be killed in 20, battles in order to evolve Academy City's most powerful Level 5 esper, Accelerator , into a Level 6 esper. Whilst learning of this, Misaka engages in her assigned battle with the aforementioned Accelerator, finding herself helpless against his reflective abilities.
Fleeing to a railway yard, she attempts a sneak attack on Accelerator using a planted mine, only for him to survive and tear off her leg. Mikoto arrives on the scene, only to look in horror as Accelerator crushes Misaka to death with a train, sending Mikoto into a furious rage. Mikoto unleashes her anger at Accelerator, who quickly deduces she is the original, and becomes further enraged upon seeing Misaka 's torn leg and hearing Accelerator's selfish reasons for participating in the experiment.
However, even her most powerful attacks are simply reflected back at her. Just then, the fight is halted by the arrival of dozens of other Sisters, who request that Accelerator stop fighting Mikoto to avoid throwing off the experiment's calculations.
As Accelerator takes his leave, Mikoto feels no comfort in hearing the Sisters acknowledge themselves as nothing more than guinea pigs. After a restless night, Mikoto is approached by Shinobu, who explains why she chose to oppose the experiment. Having been called back from Project Radio Noise to assist in Project Level 6 Shift, Shinobu got to see the sensitive side of one of the Sisters and became unable to see them as anything other than human. Upon hearing this, Mikoto takes it upon herself to destroy the facilities involved in the experiment, keeping it a secret from Kuroko and the others.
Eliminating as many facilities involved with Project Level 6 Shift through electronic warfare before she is shut out from their communication lines, Mikoto starts spending several nights attacking the other facilities directly. Kuroko, who has grown concerned about Mikoto constantly being out at night, comes across a group of girls who are looking for a "lucky card", based on an urban legend spawned from the cash card incident.
The next day, Kuroko encounters one of the girls, Minori, saving her from being hit by a car during her search, hearing how she wanted to find a lucky item for her friend who is moving away. After pointing out cash cards would be out of the question, since they would need to be turned into Judgment, Konori suggests that they instead search for a four-leaf clover.
During their search, Kazari and Ruiko give Kuroko some assurance that Mikoto, along with themselves, appreciate her efforts. Both Kuroko and Minori find four-leaved clovers, with Kuroko keeping hers and resolving to always wait for Mikoto. Meanwhile, as Mikoto manages to dwindle down the remaining facilities to two, Kites Knockraven, a higher up in the project, prepare a counter-plan. As Mikoto infiltrates one of these facilities, she finds herself against one of its members, Frenda Seivelun , who causes trouble for her using flammable tape and stuffed dolls containing bombs.
Meanwhile, Shinobu arrives at the other remaining facility, where they are attempting to transport the data whilst the other facility is being attacked. Mikoto chases down Frenda who, after a series of failed attacks, fills the room up with nitrogen, bluffing that it is an explosive gas to prevent Mikoto from using her electricity against her. However, Mikoto, refusing to simply give up and be killed, manages to fight back against Frenda, leading to her bluff becoming exposed.
As Mikoto tries to interrogate Frenda, who is unable to respond due to being shocked by her, she is suddenly attacked by ITEM's leader and the fourth ranked Level 5 esper, Shizuri Mugino. Meanwhile, Shinobu, who felt Mikoto should not have to carry her burden alone, sneaks into the basement of her facility where the incubated Sisters are being held, hoping to install emotions into all of the remaining Sisters via the Misaka Network in the hopes that it may move the organizers to suspend the experiments. However, she is apprehended by ITEM's fourth member, Saiai Kinuhata , who was guarding the facility in case a second party was involved in the attacks.
Shinobu manages to get the program installing, but it is suddenly blocked by an unforeseen error code. Shinobu fires a gun at Saiai to save herself, but her attack fails due to Saiai's Offense Armor ability and she is taken into custody. Back at the other facility, a weakened Mikoto is forced to use her ability to deflect Shizuri's Meltdowner attack, making her realize who the intruder's identity is. Coming face to face with Shizuri, Mikoto uses some of the explosive dolls that Frenda inadvertently left behind to compensate for her weakened powers.
Shizuri fights off these dolls by using silicon shards cards to divide her lasers, but Mikoto manages to knock her out with one of the remaining dolls. After finding and destroying the facility's data bank, Mikoto finds herself on the run from an angered Shizuri. Fleeing to a bridge, Mikoto manages to get the best of Shizuri by using Frenda's flammable tape to collapse the walkway underneath her and cause her to fall down. As Mikoto makes her escape, Shizuri manages to learn about Project Level 6 Shift from one of the staff and decides it would be more amusing to let Mikoto suffer.
The next day, Mikoto investigates the remaining facility, only to find it completely abandoned, allegedly having gone bankrupt. Kuroko arrives on the scene and, despite not being pleased over the presence of a supposed "boyfriend", feels relieved that Mikoto appears to be back to her cheerful self and takes her leave.
However, Mikoto's joy is short-lived when another Sister, Misaka , appears before her, telling her in private that the experiments are still ongoing. Horrified to learn more Sisters have died because of her, Mikoto ends up yelling at Misaka for reminding her of Misaka Later discovering that countless other facilities have picked up the experiment, Mikoto comes to realize that her enemy is Academy City itself.
Meanwhile, Accelerator recalls how he was first approached about Project Level 6 Shift. Deciding that she will need to do something drastic in order to stop the experiments, Mikoto feels relieved that Kuroko would still perform her duty as a Judgment officer should she be labelled a criminal for doing so. Mikoto resolves to hack into and destroy the Tree Diagram, the supercomputer responsible for the experiment's calculations, in the hope she may be able to stop them.
Arriving at Tree Diagram's control center, hoping to hack into Tree Diagram to order a halt to the experiment, Mikoto is confused to find it not only heavily low on security, but completely abandoned as well. Hacking into the system, she is horrified to learn the truth, in that Tree Diagram had been destroyed for months, with the experiments continuing regardless. Mikoto falls in despair, realizing that with Tree Diagram destroyed, she has no way of stopping the experiments. She tries to cling onto her cause by mercilessly destroying another facility, but loses all hope when she sees a live feed of Misaka being killed by Accelerator.
There, he finds the details concerning Project Level 6 Shift stuffed inside a teddy bear, learning that Misaka 's experiment is next. With all her other efforts failed, Mikoto feels convinced that letting herself be killed by Accelerator is the only way to stop the experiments, proving she does not live up to Tree Diagram's expectations.
Moved by these words, Misaka uses the Misaka Network to command the other Sisters in Academy City to manipulate the city's windmills with their electricity, affecting the wind and disrupting Accelerator's calculations, preventing him from stabilizing the plasma. Accelerator demands to know why Mikoto is protecting Misaka , to which she responds that it is simply because she is her sister.