Last week ended with Mikoto firing and Doppelganger seemingly fading into white, but the Railgun missed on purpose. Mikoto wanted to give Doppel a chance to stop fighting, shed all the slime mold, and live a normal life as she is. But ultimately Doppel doesn’t want to go on living.
Her threats were just a smokescreen for her true objective. She never actually gained a soul, which makes her continued existence a torment. By destroying herself she’ll end that torment, and by destroying the dataship and killing Kuriba, she’ll prevent another her from being created.
The dataship crashes and much of Doppel’s body blasted away, but Mikoto doesn’t kill her, and Kuriba survives. The chief doesn’t believe Doppel has no soul and even pulls a gun on Kuriba, resulting in her accidentally getting shot in the gut. The chief flees, but Misaki tracks him down and “rewinds” his memories so he’ll start over from “behind square one”.
Thanks to Shirai arriving at the scene, Kuriba is poised to make a full recovery, while Doppel was allowed to die with dignity. The next day is bright and sunny and Mikoto enjoys a nice coffee al fresco with Kuroko, who can’t help but ask for a kiss in return for her help. Kuroko, in turn, is teased by Misaki, and when Saten and Uiharu show up, they are in awe of the “Queen” and Hokaze Junko.
We cut to a parting scene with the Scavengers, who learn that due to their client’s bankruptcy they won’t be paid for their work. Leader once again proves her title is well-earned by fighting to get her team’s levels increased as consolation for the cash falling through, while it’s ambiguously revealed when Naru strips him down that Seike is a boy, or the “blue” ranger of their group.
More season housekeeping ensues, including the triumphant return of a fully-recovered Kongou Mitsuko (how I’ve missed her) finally getting to (accidentally) meet Mikoto’s “sister”, whom she nicknames “Ii-chan” (after “1”0032). We also see Misaki with Mitori and Dolly, and they agree to take things slow in terms of loosening their dear friend’s training wheels of normal life.
As Kuriba convalesces in hospital, she has a dream with Doppel, who notes that her creator has always been unable to separate her research and objectives from the rest of her life. To that end, she offers Kuriba a list of issues with her present cyborg designs that she should iron out. When she wakes up, Kuriba thought at first it was her guilt causing the dreams, but admits the possibility of a part of Doppel (beyond the organs used to save her) lives on in Kuriba.
Mikoto then departs the hospital with her schoolbag behind shoulder, and back out into the lovely sunny day in Academy City. Kuroko, Saten and Uiharu are waiting up for her, eager to go someplace good to eat. Mikoto doesn’t care where, as long as they’re together.
With that, Railgun T (as in “T”hird…I can’t believe I never realized that before) comes to a pleasant and satisfying end. Well, satisfying in that everything was resolved nicely, but to be honest I’d much rather watch a fourth Railgun than a fourth Index or second Accelerator. I’m among those who watched the first Railgun prior to watching the first Index, and while Index is regarded as the flagship series, Railgun has been and always will be my number one.