S03E24: Diffusion
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.
Previous Episode 
Season 1
Electromaster
S1E1 / 02 Oct 2009
When Working Under a Hot Sun, Rehydration Is Essential
S1E2 / 09 Oct 2009
Tokiwadai Is Targeted
S1E3 / 16 Oct 2009
Urban Legends
S1E4 / 23 Oct 2009
A Certain Pair of New Trainees
S1E5 / 30 Oct 2009
Everyone is Proactive When it Comes to This
S1E6 / 06 Nov 2009
Abilities and Powers
S1E7 / 13 Nov 2009
Level Upper
S1E8 / 20 Nov 2009
Majority Report
S1E9 / 27 Nov 2009
Silent Majority
S1E10 / 04 Dec 2009
Dr. Kiyama
S1E11 / 11 Dec 2009
AIM Burst
S1E12 / 18 Dec 2009
Special Workshop
S1E14 / 08 Jan 2010
Skill Out
S1E15 / 15 Jan 2010
Academy City
S1E16 / 22 Jan 2010
Tsuzuri's Summer Vacation
S1E17 / 29 Jan 2010
Asunaro Park
S1E18 / 06 Feb 2010
Midsummer Festival
S1E19 / 12 Feb 2010
Poltergeist
S1E20 / 19 Feb 2010
Voices
S1E21 / 26 Feb 2010
Level 6
S1E22 / 05 Mar 2010
What Is It You See in Your Eyes Right Now?
S1E23 / 12 Mar 2010
Dear My Friends
S1E24 / 20 Mar 2010
Season 2
Railgun
S2E1 / 12 Apr 2013
Critical
S2E2 / 19 Apr 2013
Project Radio Noise
S2E3 / 26 Apr 2013
Sisters
S2E4 / 03 May 2013
Project Level 6 Shift
S2E5 / 10 May 2013
I... Can See All of You
S2E6 / 17 May 2013
I... I Want to Be of Help To You, Sissy
S2E7 / 24 May 2013
ITEM
S2E8 / 31 May 2013
AIM Stalker
S2E9 / 07 Jun 2013
Meltdowner
S2E10 / 14 Jun 2013
The Vending Machine
S2E11 / 21 Jun 2013
Tree Diagram
S2E12 / 28 Jun 2013
Accelerator
S2E13 / 05 Jul 2013
The Promise
S2E14 / 12 Jul 2013
Kamijo Toma
S2E15 / 19 Jul 2013
Sisterhood
S2E16 / 26 Jul 2013
Study Group
S2E17 / 02 Aug 2013
Moving
S2E18 / 16 Aug 2013
Academic Reach Assembly
S2E19 / 23 Aug 2013
Febri
S2E20 / 23 Aug 2013
Darkness
S2E21 / 30 Aug 2013
STUDY
S2E22 / 06 Sep 2013
Silent Party
S2E23 / 13 Sep 2013
Eternal Party
S2E24 / 20 Sep 2013
Season 3
Super-powered (Level 5)
S3E1 / 10 Jan 2020
The Daihasei Festival
S3E2 / 17 Jan 2020
Balloon Hunter
S3E3 / 24 Jan 2020
Tampering
S3E4 / 31 Jan 2020
Trust
S3E5 / 07 Feb 2020
The Battle Begins
S3E6 / 14 Feb 2020
Auribus oculi fideliores sunt
S3E7 / 28 Feb 2020
Railgun ✕ Mental Out
S3E8 / 20 Mar 2020
Kozaku Mitori
S3E9 / 27 Mar 2020
Clone Dolly
S3E10 / 03 Apr 2020
Joining the Battle
S3E11 / 10 Apr 2020
Exterior
S3E12 / 17 Apr 2020
SYSTEM (Those Who Arrive at Heaven's Will in an Only Human Body)
S3E13 / 01 May 2020
Dragon Strike (Jaw of the Dragon King)
S3E14 / 15 May 2020
Promise
S3E15 / 22 May 2020
Dream Ranker
S3E16 / 24 Jul 2020
Precognition
S3E17 / 31 Jul 2020
Bust Upper
S3E18 / 07 Aug 2020
Strange Coincidence
S3E19 / 14 Aug 2020
Ha Det Bra
S3E20 / 21 Aug 2020
Doppelganger
S3E21 / 28 Aug 2020
Scavenger
S3E22 / 04 Sep 2020
Possession
S3E23 / 11 Sep 2020
Diffusion
S3E24 / 18 Sep 2020
My Dear Friends
S3E25 / 25 Sep 2020
Rina Sato
Mikoto Misaka (voice)
Satomi Arai
Kuroko Shirai (voice)
Aki Toyosaki
Kazari Uiharu (voice)
Kanae Itou
Ruiko Saten (voice)
Minako Kotobuki
Mitsuko Kongou (voice)
Atsuko Tanaka
Harumi Kiyama (voice)
Atsushi Abe
Toma Kamijo (voice)
