Every season of A Certain Scientific Railgun ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of A Certain Scientific Railgun!

Mikoto, Kuroko, Kazari, and Ruiko take action against a gang of bank robbers. When Ruiko is injured trying to rescue an innocent bystander, Mikoto angrily unleashes her railgun power!

Electromaster

Mikoto and Kuroko get in trouble for using their powers in the dorm. Their punishment: pool cleaning duty! Later, Kuroko finds herself feeling frisky after accidentally ingesting a powerful aphrodisiac!

When Working Under a Hot Sun, Rehydration is Essential

Someone is tasering students and drawing on their faces with permanent marker! While Kuroko and Kazari investigate, poor Ruiko becomes the latest victim. Who is behind the unusual attacks?

Tokiwadai is Targeted

Awkwardness ensues when Mikoto runs into Kamijo. When they meet again later in the day, Mikoto demands a duel! She gives it her all, but there’s a chance she’s no match for Kamijo’s powers.

Urban Legends

Uiharu and Kuroko have an argument that leads to recollections of the past, when the girls were young Judgment recruits, and a dangerous mission resulted in a life-long promise between friends.

A Certain Pair of New Trainees

Someone is planting bombs all over Academy City, and it’s up to Judgment to stop the person responsible. Mikoto, wanting a piece of the action, uses Uiharu’s badge to investigate on her own.

Everyone is Proactive When it Comes to This

As Kuroko and Konori begin to suspect Judgement officers are the true targets of the mysterious bomber, Uiharu, Mikoto, and Saten find themselves in an explosive situation while shopping!

Abilities and Powers

Mikoto and Kuroko ponder the ramifications of Kaitabi’s shocking display of strength and wonder if Level Uppers actually exist. Before they can find answers, Kaitabi mysteriously slips into a coma!

Level Upper

Even as Mikoto and Kuroko question Dr. Kiyami about the side-effects of Level Uppers, Saten wonders if she should use the one she recently found - even though there could be dangerous consequences.

Majority Report

Saten falls into a coma after she confesses using a Level Upper to Uiharu. Later, Mikoto and Kuroko discover that all of the recent coma patients are connected - in more ways than one!

Silent Majority

After inadvertently connecting to Kiyama’s mind, Mikoto learns what’s been motivating the doctor’s actions. Later, when the network goes out of control, Mikoto comes face to face with a monster!

Dr. Kiyama

The girls work to stop the monster before it reaches a nuclear power plant! Uiharu’s efforts slow the abomination down, but Mikoto might be the only person able to stop the creature’s rampage!

AIM Burst

The Swim Club recruits Misaka and the gang to strut their stuff as swimsuit models! Later, after taking a break from posing and primping, the girls work together to make some curry.

A Bikini Divides the Eyeline Between Top and Bottom, But a One-piece Shows Off the Figure, so They Only Flatter the Slender

Saten and the other students who used the Level Upper learn some valuable lessons when they attend a special weekend workshop taught by Komoe and Yomikawa.

Special Workshop

Misaka and Kuroko investigate a gang called Skill Out. The group is known to be attacking Espers all over Academy City - but in some instances, a mysterious man arrives just in time to stop the confrontation.

Skill Out

Konori’s past with Big Spider is revealed. In the present, she finds herself torn. Can she honor her responsibilities as a Judgment officer while somehow remaining loyal to Kurozuma?

Academy City

After Komoe and Yomikawa encourage her to get a hobby, Tesso rediscovers an old school arcade game she loved as a child and forms an unlikely bond with a fellow fan.

Tsuzuri's Summer Vacation

Misaka and the girls decide to play matchmaker with their dorm’s Head Resident and Daigo, Uiharu and Saten's teacher. Things look to be working out - until Daigo brings up the subject of marriage.

Asunaro Park

The midsummer festival arrives, and students are preparing to show off their school for friends and family. Misaka’s scheduled to perform a violin solo for the festivities - if her nerves don’t get the best of her!

Midsummer Festival

The gang discovers that the recent wave of earthquakes is connected to a phenomenon called poltergeisting - and there’s a chance Uiharu’s new roomie might be somehow be involved.

Poltergeist

Kuroko suspects Haru'ue has something to do with the recent poltergeisting events, and it’s causing tension between her and Uiharu. Later, Haru'ue reveals a hidden part of her past.

Voices

The past comes into focus as Haru'ue and Edasaki’s connection to a common Child Error facility is revealed. Later, Misaka sets out to find Kiyama after learning that the rogue scientist is out on bail and working with the Frog Doctor.

Level 6

Therestina reveals new information about her real identity and her master plan. Meanwhile, Kuroko and the gang vow to fight alongside Misaka in order to save the children jeopardized by Therestina’s activities.

What Is It You See In Your Eyes Right Now?

Misaka and her friends reach the facility where the children are being held, but Therestina uses Capacity Down to take the Espers out of the fight. With everything on the line, it’s up to Saten to save the day.

Dear My Friends

Haru'ue joins Saten and Uiharu on a trip to the Garden of Learning to see Misaka and Shirai, as well as to do some shopping. They later go to visit Edasaki in the hospital, where she is undergoing physical therapy, when things take an unexpected twist.

Railgun

After dreaming of her past, Misaka sets out for a day of shopping, but when Kuroko suggests a shortcut, they find an envelope with a cash card in it--one of many placed throughout town. Elsewhere, Saten thinks she sees someone who looks like Misaka.

Critical

Rumors swirl about that Misaka is the template for a project to produce Level 5 clones. When Nunotaba refers to her as the "Original," Misaka decides to check her out, and learns that she worked at the hospital where Misaka submitted her DNA map.

Project Radio Noise

In high spirits, Misaka joins the other girls for a day of shopping at Seventh Mist, where she helps the others with their shopping, as well. Misaka spends another day playing with children. One of Misaka's clones goes through the phases of her training.

Sisters

Finding herself face-to-face with a clone of herself, Misaka ends up helping her get a cat out of a tree, sharing ice cream cones, and having tea with her. It isn't until later that Misaka discovers the true, sinister project that calls for her clones.

Project Level 6 Shift

Misaka lashes out at Accelerator, but is left frustrated. She realizes the full breadth of the situation she has become involved in, and feels responsible for allowing it to happen. Nunotaba discusses the ramifacations of the clones' existence with Misaka.

I... Can See All Of You

Misaka manages to sabotage most of the experimental facilities remotely before she is cut off, leaving her to deal with the rest in person. Shirai resolves to help Misaka by doing her part to be more vigilant at work, but risks shutting the others out.

I... I Want To Be Of Help To You, Sissy

The members of the underworld organization ITEM finish one mission, and are called in to defend the remaining facilities. When Misaka tries to infiltrate one building, she encounters Item member Frenda. Meanwhile, Nunotaba drops in at the other facility.

ITEM

As Misaka continues her way into the research facility, she and Mugino play a game of cat-and-mouse. Meanwhile, at the other facility, Nunotaba sneaks into a control room, planning to disrupt the experiment by adding a new factor to the Misaka Network.

AIM Stalker

Having realized who Misaka is, Mugino decides to give her a run for her third-place ranking. When Frenda mistakenly leaves her doll-bombs behind while heading to the other facility, Misaka collects them and uses them to supplement her diminished powers.

Meltdowner

Misaka and Kamijo meet again at the malfunctioning vending machine in the park, where Shirai mistakes him for being Misaka's boyfriend. Misaka becomes shaken when she bumps into another Misaka clone, and learns that the experiments are still ongoing.

The Vending Machine

Misaka sets out on one last mission to put a halt to the experiments by destroying the supercomputer Tree Diagram. Meanwhile, Kamijo runs into Misaka's clone #10032 again, and the two of them decide what they should do about a stray kitten she has found.

Tree Diagram

Thwarted in her attempt to sabotage Tree Diagram, Misaka takes her frustration out on a nearby lab that is part of the project. Meanwhile, Accelerator and #10031 carry out their experiment, while Kamijo searches for Misaka's missing sister.

Accelerator

While Shirai frets about Misaka staying out again all night, she receives a visit from Kamijo, who manages to find Misaka's documents about the project. Kamijo catches up with Misaka on a bridge, where he tries to talk her out of doing anything rash.

The Promise

Kamijo races to the scene of the experiment, only to find that it has already started. Kamijo calls out Accelerator, who takes him to be yet another challenger to his position, until for the first time, as Misaka watches on, he gets his nose bloodied.

Kamijo Toma

Misaka stands up for clone #10032, declaring that she is doing so because they are sisters. The next day, the two of them spend time in a park, where 10032 asks her for a special favor. Later, Misaka has difficulty trying to express her thanks to Kamijo.

Sisterhood

With the end of summer vacation approaching, the girls plan a study session at Saten's apartment to catch up on homework. Everyone is to bring an ingredient for a potluck stew party, but most have trouble deciding what to buy, leading to some surprises.

Study Group

Edasaki is due to be discharged from the hospital, and it is learned that she will be living with Haru'ue. The move is bittersweet for Uiharu, who is losing her roommate, but she feels it is for the best. Meanwhile, a new movement is afoot in the city.

Moving

Febri takes an instant liking to Saten, and is warm to everyone except for Misaka, much to her chagrin. At Judgment, Uiharu is unable to find any information on who Febri is, so arrangements are made to admit her into an orphanage as a "Child Error."

Academic Reach Assembly

As Yomikawa takes over investigating the runaway security robots, Konori invites the whole gang out to take in a bath at a bathhouse. On their way home, a number of detours lead them to a confrontation with yet another, much more dangerous runaway robot.

Febri

With the revelation that Febri is synthetic, Misaka is determined to find whoever built her, and have them fix her. The investigation is stalled on all fronts, even with the help of her friends running down leads, until help comes from a surprise source.

Darkness

Therestina reluctantly provides Misaka with the clues she needs to find the group behind Febrie's secret. With Kongo's help, the girls identify Aritomi as the man they are pursuing, and find out more about him and his company, the STUDY Corporation.

STUDY

Aritomi reveals his motivations for STUDY's project to Misaka. She also learns about Nunotaba's plight, and some of the details concerning what STUDY has planned at the Reach Assembly the next day. Will she be able to escape and put a stop them?

Silent Party

Shirai, Konori, Kongo and friends, and Uiharu and Saten confront the powered suits at the four Assembly sites, where they soon receive backup. Misaka and Febrie move to take on Aritomi directly, but he has one final surprise up his sleeve for them.

Eternal Party

Academy City's Daihasei Festival is approaching, and the festival's steering committee is charged with recruiting at least two Level 5s to take the athlete's pledge during the opening ceremonies. However, getting volunteers proves to be a challenge.

Super-powered (Level 5)

As the Daihasei Festival begins, Uiharu and Saten enjoy themselves, while Kuroko sees to her Judgment duties. Mikoto and Kongo run an eventful three-legged race against teams from other schools. A plot involving MEMBER begins going into motion.

The Daihasei Festival

The Tokiwadai team competes in the Balloon Hunter event, but due to a case of mistaken identity, one of the Sisters substitutes for Mikoto. Yoshio Baba feeds the other school's team with data on the Tokiwadai competitors, with surprising results.

Balloon Hunter

Saten's quest for Shadow Metal ends up landing her in trouble. Uiharu notices something amiss with the website Saten was browsing. Mikoto learns that Wannai did not get her gym uniform returned, prompting her to go track down her Sister.

Tampering

With her closest friends now giving her the cold shoulder, Mikoto feels isolated and helpless, but finds a surprise ally in Kongo. Kongo tries to track down any clues that will lead her to the whereabouts of Mikoto's missing "twin sister."

Trust

Saten carries an injured Kongo to safety, while Awatsuki and Wannai tackle Yoshio Baba and his robotic Great Danes. Mikoto spots Saten with Kongo in an ambulance, blames herself for getting Kongo hurt, and determines to set things right.

The Battle Begins

With Kongo out of danger, Awatsuki finishes the task of having her psychometrist friend probe the kitten's memories. What Saten hears gives her pause, and she turns to Kuroko for advice. Kozaku confronts Mikoto, asking her about the Sisters.

Auribus oculi fideliores sunt

With the assistance of her friends, Mikoto identifies the location from the website data that Uiharu recovered. Upon arriving at the location, Mikoto finds Shokuho waiting for her, and reveals her side of the events that have led up to this point.

Railgun ✕ Mental Out

Mikoto and Shokuho continue pursuing Gensei Kihara using their own individual methods. Kuroko attempts to identify the girl who abducted Uiharu and Misuzu. Saten decides to investigate an abandoned factory that may be connected to the case.

Kozaku Mitori

Shokuho and Mikoto find themselves in a traffic jam, and Shokuho demonstrates a tremendous example of her ability. The background behind the Exterior project is revealed, as well as Shokuho's connection to one of the original Misaka clones.

Clone Dolly

Kozaku uses Exterior to make her way into Mikoto's mind, convincing her to attack the building without windows. Before she can go after Gensei, Shokuho must contend with Kozaku's puppet, until help arrives from an unexpected source.

Joining the Battle

Kamijo and Sogiita find that at best, they can only slow down Mikoto's transformation. Kuroko continues to search for Kozaku while dodging her puppet. Gensei pursues Shokuho for the access code that will let him unlock Exterior's potential.

Exterior

Kuroko continues searching for Kozaku, but after exhausting every possible hiding spot in the building, she must reexamine her situation. When Mikoto's transformation hits a critical threshold, it is time for Gensei to unlock Exterior's limiter.

SYSTEM (Those Who Arrive at Heaven's Will in an Only Human Body)

Gensei has fallen victim to Shokuho's cunning, but Mikoto is still struggling to contain her power. Kamijo decides that he must help her at any cost.

Dragon Strike (Jaw of the Dragon King)

A young Kozaku grins and bears her way through her youth in an Academy City research institution, where she befriends Dolly, one of the other girls there. But when Kozaku learns the grim truth about Dolly, it sets her on a life-altering course.

Promise

Mikoto is introduced to Indian Poker, a new fad that is sweeping Academy City, which allows people to share their dreams, by Shokuho Clique member Hokaze. Saten tells Uiharu about a new app that seems to predict accidents before they happen.

Dream Ranker

To demonstrate the authenticity of his predictions, Miyama sends Kuroko out with foreknowledge of several incidents that are about to take place. But when two cases occur in close proximity, Kuroko decides to call in additional help from Judgment.

Precognition

After Saten demonstrates skills she acquired through Indian Poker, Mikoto comes upon a Trader who happens to have a card she is keenly interested in. However, ITEM operative Kinuhata is also eager to obtain the card for herself, to the same end.

Bust  Upper

When Saten buys the last of the mackerel at the supermarket, Frenda pesters her to let her have them, eventually leading to an unexpected friendship. However, when her seemingly innocuous text message is intercepted, Saten finds herself in danger.

Strange Coincidence

Frenda and Saten find themselves under fire from an unknown assailant, and duck into a department store to find cover. When none of Frenda's usual tricks seems to work against their pursuer, she has no choice but to resort to drastic measures.

Ha Det Bra

Shokuho approaches Mikoto to ask her to break into a research facility and determine the results of a unique experiment. But before Mikoto can enter the building, she has an encounter that raises serious questions for her, demanding good answers.

Doppelganger

Kuriba explains to Mikoto and Shokuho how she fears that the Doppelganger's "soul" might pose a threat to the city. The members of Scavenger move in to incapacitate and capture the Doppelganger, but find their task more difficult than expected.

Scavenger

Shocked by the arrival of the Level 5 Mikoto, the members of Scavenger must keep their dark side affiliation a secret from her. Scavenger's Leader proposes that Mikoto teams up with them, since they share the goal of stopping the Doppelganger.

Possession

To counter the Doppelganger's giant monster form, Mikoto creates a giant magnetically-induced monster of her own. As the two do battle, it becomes evident that the Doppelganger has an ultimate objective other than combat in mind.

Diffusion

As the fight atop the airship draws to a close, the Doppelganger's true intentions become clear. Following the battle, the members of Scavenger seek to regain their former glory, while the circle of Mikoto's friends becomes more interconnected.

My Dear Friends

Misaka's electro-manipulation skills - and her delightfully destructive railgun projectile movement - make her a rock star in Academy City. The techno-metropolis is filled with supernaturally powerful students known as Espers, including Misaka's flirtatious friend and roommate, Shirai Kuroko. She uses her teleportation skills as a member of the Judgment law enforcement team, fighting crime alongside fellow agent Uiharu. Joined by their friend Saten, a spunky Level 0 Esper, Misaka, Kuroko, and Uiharu have a blast taking on danger whenever and wherever it arises.

The Best Seasons of A Certain Scientific Railgun

The Best Seasons of A Certain Scientific Railgun

Season 3

Season 2

Season 1