Toaru Kagaku no Railgun T Episode 12


 * romaji = Gaisō Dai Nō (Ekusuteria)
 * airdate = April 17, 2020
 * writer = Uchida Hiroki
 * director = Episode Director Mori YoshihiroStoryboard Tachibana Hideki

Yanagisawa TetsuyaAnimation Director Yamauchi Noriyasu

Ito Tomomi

Zhipeng Wu

Ogawa Koji

Eto Taiki

Fujibe IkumaChief Animation Director Tomioka Hiroshi

Yoshida Yuko
 * op = final phase
 * ed = nameless story
 * ep-prev =
 * ep-next = }}Exterior (外装代脳)|Gaisō Dai Nō (Ekusuteria)|lit. "Exterior Substitute Brain"}} is the 12th episode of Toaru Kagaku no Railgun T. It was broadcast on April 17th 2020. The episode was directed by Mori Yoshihiro, the screenplay written by Uchida Hiroki, and storyboarded by Tachibana Hideki and Yanagisawa Tetsuya.

Kamijou's right hand was revealed to only have a temporary effect on Mikoto, who has transformed into a grotesque appearance. On the contrary, it caused Mikoto's form to change once again, her power growing as well. Those powers that continue to flow within Mikoto cannot be held back, but Kamijou and the others do everything they could to keep her at bay. Meanwhile, Kuroko confronted the puppet controlled by Kouzaku's ability. During this time, Uiharu and Saten successfully pinpointed the building where Kouzaku was actually located. Driven to a corner, Kouzaku lures Kuroko into her trap.

Gensei searches around Shokuhou's safehouse as he aims for the limiter release code for the Exterior. Shokuhou had set up several traps beforehand, hoping that it could hamper his movement, but Gensei paved his way through using the many esper abilities in his arsenal as a Multi-Skill. At the very last moment, Shokuhou uses a certain device and emerges with one final gamble!

Major Events

 * Misaka Mikoto undergoes a second transformation after the failed attempt by Kamijou Touma in negating her powers. Touma joined Sogiita Gunha in keeping Mikoto at bay, hopeful that someone else can find and destroy the source of her rampaging powers.
 * Shokuhou Misaki stalked Kihara Gensei, who needed the limiter release code for the Exterior to gain full control of Mikoto's powers, as she prepared traps to deal with him. In the end, Gensei cornered Misaki and obtained the limiter release codes by using Mental Out against her.
 * With the help of Uiharu and Saten, Kuroko found Kouzaku Mitori's location and was planning to finally corner and apprehend her.

Characters
By order of appearance:


 * Sogiita Gunha
 * Misaka Mikoto
 * Kamijou Touma
 * Kihara Gensei
 * Shokuhou Misaki
 * Shirai Kuroko
 * Kouzaku Mitori
 * Kiyama Harumi (mentioned)
 * Accelerator (indirectly referenced)
 * Saten Ruiko
 * Uiharu Kazari

Abilities

 * Unknown - Sogiita Gunha, Level 5
 * Electromaster (Railgun-variant) with Misaka Network - Misaka Mikoto, Level 5
 * Imagine Breaker - Kamijou Touma
 * Teleport - Shirai Kuroko, Level 4
 * Liquid Shadow - Kouzaku Mitori, Level 4
 * Mental Out with Exterior - Shokuhou Misaki, Level 5
 * Mental Out with Exterior - Kihara Gensei

New Abilities

 * Multi-Skill - Kihara Gensei, acquired via Level Upper
 * Clairvoyance
 * Aero Shooter
 * Asport (unnamed)
 * Ice Beam (unnamed)

Locations

 * Academy City
 * School District 2
 * Exterior
 * Bank Control Center (flashback)
 * School District 7
 * Judgment 177 Branch Office

Referbacks

 * When Kuroko remembers her investigation on Kouzaku Mitori's falsification of her Bank records while battling her Shadow Puppet, a scene from  is used as flashback, specifically where she and Uiharu investigate her records at the control center of the Bank.
 * Kihara Gensei references Level Upper and its administrator Kiyama Harumi in this episode, and the second time they are referenced in Season 3.
 * Kuroko's special ointment created by Heaven Canceller, first seen on Tree Diagram Remnant Arc in Index II, is used once again by Kuroko in this episode, treating her arm wound caused by Mitori's Shadow Puppet.

Cultural References

 * The name of the countermeasure "Hag's Hug" might be a reference to the Old Hag or, a creature from English folklore which would sit on a person's chest while they were sleeping, causing shortness of breath and paralysis.

Differences in Adaptation

 * Unlike in the manga, Exterior's codes (including the boost code, the limiter release code and the self-destruct code) are merely referenced and not shown in any form.

Animation Trivia

 * At least 1 minute of footage from the previous episode is reused in the beginning of the episode before actual original scenes for the episode are seen.

Unanswered Questions

 * What methods did Kihara Gensei use to gather his subjects with special abilities for the use of Multi-Skill via Level Upper?
 * Did Gensei finally got the Exterior Limiter code from Misaki?