A Certain Scientific Railgun: Season 3

In the run-up to the Daihasei Sports Festival, Mikoto Misaka, along with other Level 5 espers, is approached with the offer of giving the athlete's pledge during the festival's opening ceremony. Meanwhile, when a fight breaks out between cheer squads over the use of the main stage, Kazari Uiharu steps in to try and stop them. This attracts the attention of the seventh-ranked Level 5 esper, Gunha Sogīta, who ends up causing more harm than good with his powerful yet unknown ability. As Kazari and

Following some explosive improv from Gunha, the Daihasei Festival begins with a three-legged race, with Mitsuko Kongō pairing up with Mikoto in place of the injured Kuroko Shirai. While Mikoto goes to change her outfit after winning her race, Misaka 10032 is mistaken for Mikoto and brought to take part in Tokiwadai's next event, Balloon Hunter, where someone has his sights set on her.

Tokiwadai begins the Balloon Hunter event against the opposing school, who gains an early lead due to intel on Tokiwadai's espers provided by MEMBER operative Yoshio Baba. Believing Misaka 10032 to be Mikoto, Yoshio sends his teammates to gang up on her while he sends a robotic mosquito to inject her with a nanodevice. After the event ends in Tokiwadai's defeat, Mikoto goes to have lunch with her mother Misuzu Misaka, having a run-in with Toma Kamijo and Misaki while getting drinks, while Ruiko

Mikoto rushes in to rescue Ruiko from some suited people as she searches one of the unused grounds for Shadow Metal, only to discover they were simply security officers doing their job. Meanwhile, Kazari uses her hacking skills to discover the site that Ruiko got the rumor about Shadow Metal, keeping what she learned to herself. The next day, Mikoto discovers that Misaka 10032 has gone missing, learning that she was taken away by an ambulance whose drivers were being manipulated by Misaki. After

Mitsuko, who was able to recognize Misaka 10032 as a different person, learns from Mikoto about Misaki's wrongdoings and decides to search for Misaka 10032 in her stead. Finding a cat at the scene of Misaka 10032's disappearance, Mitsuko learns that it belonged to the sister from Kinuho Wannai, who goes to fetch another esper who can help understand animals. This attracts the attention of Yoshio, who lures Mitsuko away and sends a group of robotic dogs to attack her. Yoshio manages to hit Mitsuk

Yoshio uses the lure of the nanomachine, which could potentially be used to help Mitsuko, to split up Kinuho and Ma'aya. Meanwhile, Ruiko brings Mitsuko to the hospital, where Mikoto discovers her condition and angrily breaks away from Misaki's clique. Yoshio tries to overwhelm Kinuho by taking her away from the water source so she can't use her Hydro Hand ability, but she takes advantage of the water she carried through an underground drain to defeat him. He attempts to use the nanomachine mosq

With the help of an esper, Kinuho, Ma'aya, and Ruiko learn some of the circumstances of Misaka 10032's disappearance from the cat. Just as Mikoto receives this information from Ruiko, she is approached by a girl named Mitori Kōzaku, who has taken both Kazari and Misuzu hostage. As Kuroko arrives to help Mikoto rescue both hostages, they discover Mitori's partner is a mass of liquid metal controlled by her ability. After getting Kazari and Misuzu to safety, Ruiko explains that something Misaki me

Mikoto tracks down Misaki, who reveals she had hidden Misaka 10032 to keep her safe from the group pursuing the Sisters to access the Misaka Network. She further reveals that the man behind it is Gensei Kihara, who was the advocate of the Level 6 Shift Project and Misaki's worst enemy. As the two of them head towards a conference building where Gensei awaits, Kuroko, Kazari, and Ruiko look for information about Mitori.

While Mikoto and Misaki take their approaches in infiltrating Gensei's headquarters, Kuroko and Kazari head to the Bank Control Center to look for more information about Mitori. They find out that she is declared dead 2 years ago. Meanwhile, Ruiko lends her good luck charm to Tōma for a scavenger hunt, after which she spots an abandoned factory that once produced the liquid metal Mitori controlled, finding it is still in use. Ruiko is caught by Mitori's liquid metal clone but is rescued by MEMBE

As Misaki is forced to use a power booster called Exterior to push her abilities to the limits and get through a traffic jam, she recalls her time in a training facility. Here, she was asked by scientists to use her powers to have a clone named Dolly recognize her as her friend Mi. After Dolly suddenly died, Misaki learned that the scientists were planning to use the Exterior Project to allow anyone to use Mental Out, leading her to brainwash the entire personnel to keep it under control. As Mik

Tōma, having learned about the situation from Xochitl, is given instructions from Misaki on how to deal with Mikoto, who is manipulated by Mitori's usage of Misaki's powers into attacking the Windowless Building. After Kuroko arrives and gets Misaka 10032 to safety, she is tasked with finding Mitori to stop her control on Mikoto, facing up against her metal puppet along the way. As Gunha arrives on the scene to assist Tōma in stopping Mikoto, Misaki goes to confront Gensei himself.

Realizing Gensei is trying to obtain the limiter unlock code for Exterior from her to control Mikoto further, Misaki attempts to trap him only to discover he possesses Multiskill, allowing him to use multiple abilities. Meanwhile, Kuroko begins to close in on Mitori, facing tougher opposition from the puppet. Misaki sets up a multi-phase trap to try and stop Gensei, but he manages to see through every step, ultimately managing to get past Misaki's mental defenses and obtain the code.

After Kazari discovers that Mitori had hijacked an Anti-Skill camera drone to help control her liquid metal clone, she hijacks the camera herself to fake Kuroko's death, allowing the real Kuroko to find Mitori hiding in the sewers and take her down. Meanwhile, Gensei discovers too late that the input code he got from Misaki was Exterior's self-destruct code, which Misaki had tricked him into using by rewriting her memory. With Exterior destroyed, Mikoto regains her senses but is still unable to

Working along with Gunha, Tōma uses the power that lies beyond Imagine Breaker, finally stopping Mikoto's rampage and returning her to normal. Afterward, Mikoto goes to visit Mitsuko, who feels happy upon hearing that Kinuho and Ma'aya came to her aid. After restoring the memories of Kuroko and the others, while rewriting others of the whole incident to appear like a terrorist attack, Misaki approaches Mitori. As the Daihasei Festival comes to a close without further incident, Ruiko arranges for

Mitori recalls her time in a facility where she ended up being befriended by Dolly before she met with Misaki. After discovering that Dolly was a clone that was being fed experimental drugs, she was caught and confined for several months, leading to a building hatred towards the governing board. In the present, Misaki brings Mitori to meet Dolly's "little sister" that has inherited her memories, leading to a touching reunion between the three of them.

Junko Hokaze, a member of Misaki's clique, gives Mikoto an Indian Poker card that allegedly lets people experience other people's dreams. Trying out the card for herself, Mikoto experiences Junko's dream, which turns out to be less pleasant than she originally expected. The next day, Junko tries holding a tea party to help Mikoto and Misaki get along, but they become angered after overhearing a certain blue-haired boy giving out cards based on his dubious fantasies of them. Meanwhile, Kuroko and

Working together, Kuroko manages to use her teleportation to prevent more accidents predicted by Shaei's precognitions. As Judgment takes countermeasures to prevent multiple potential accidents predicted to happen near each other at the park, Shaei collapses as a result of overusing his ability. At the predicted time, cherry blossom trees suddenly set ablaze, which Kuroko deduces is due to a chemical that was injected into them to bloom all year round. As Kuroko works to save civilians, Shaei de

Coming across an Indian Poker trader on the street, Saiai Kinuhata, one of the ITEM's members with a complex about her figure, fights with Mikoto over a card relating to something called the "Bust Upper". After their fight causes all the cards to become mixed up, Mikoto and Saiai, realizing they have the same goal, purchase all the cards and try them out one by one in search of the Bust Upper. Despite trying out all the cards, including one that gives Mikoto a rather foreboding dream, the pair a

After Ruiko ends up buying the last cans of mackerel she wanted to buy, Frenda Seivelun tries to get some off of her and ends up having dinner with her, leading the two of them to become friends. Sometime later, as Ruiko buys herself another Indian Poker card, a group called SCHOOL looking for a card about something called Tweezers arrange for her to be kidnapped, prompting Frenda to go and rescue her. After the kidnap attempt is foiled, SCHOOL calls upon the sniper Rakko Yumiya to hunt down Rui

Despite dealing multiple shots to Frenda as she pursues them into a shopping mall, Yumiya falls for a trap by Frenda and Ruiko, exposing herself as their pursuer. While Ruiko escapes with the other customers, Frenda faces off against Yumiya in a one-on-one duel, winning against her using her bombs. As SCHOOL, led by Teitoku, plan their next move regarding the tweezers, Ruiko never hears from Frenda again.

Misaki looks into Ryōko Kuriba, who allegedly came up with the plans for Indian Poker. She learns that Ryōko was part of her experiment using cyborg technology to turn her into two people before being rejoined to determine if a soul could be created. As Mikoto is sent by Misaki to investigate the results of the experiments, the cyborg Doppelganger of Ryōko left after the experiment, who believed herself to be human, experiences an identity crisis and breaks out of her facility. Mikoto and Misaki

Ryōko states that she believes destroying Doppelganger's body could cause calamity to befall Academy City, leading her to invent Indian Poker as a means to crowdsource a solution. Later on, Ryōko is confronted by Doppelganger, before Scavenger shows up to try and detain Doppelganger. As the other members struggle again with Doppelganger's power, Ryōko is pursued by Tarōmaru Seike but is rescued by Mikoto after she learns that Ryōko created Doppelganger as a means to save her mother. Upon receivi

Wanting to avoid a fight, Scavenger leader Rita Īzumi somehow manages to convince Mikoto that she's a member of Judgment sent to recover Doppelganger. While Mikoto pursues Doppelganger, who's targeting an airship filled with secret information, Rita guides them towards the facility the Scavengers were supposed to deliver Doppelganger to so they can sign off their job and escape. Facing off against Mikoto, Doppelganger continues to absorb more matter to grow to an enormous size.

Mikoto uses her ability to create her giant out of iron sand, using its properties to fire off a powerful electrical that can cut through Doppelganger's body. Doppelganger responds by forcing Mikoto to shoot down fuel tanks to protect civilians, exposing the airship in the process. As Ryōko tries to reason with Doppelganger to let her find a way to eliminate her soul, she attempts to jump to her death but is saved by the Scavengers. Learning from Misaki and Rita that Doppelganger's ability is a

Learning that Doppelganger's objective was to end her life and destroy the data that could rebuild her, Mikoto respects her wishes and destroys the airship. Before Mikoto can finish off Doppelganger, one of the scientists' attempts to take Ryōko hostage to stop her, accidentally shooting her in the process. In her final moments, Doppelganger asks Mikoto to use what's left of her cyborg body to save Ryōko. Later, the Scavengers increase their rank in exchange for not getting paid for their missio