Similar to its parent show A Certain Magical Index, A Certain Scientific Railgun will be recapped by story arcs, taking note of the differences between adaptations.
Warning! Recap pages do not get spoiler tags. All current and prior spoilers on these pages will be unmarked. (Forward-looking spoilers may be marked as a courtesy but this is not guaranteed.)
Original Series
- Level Upper
- Big Spider *
- Poltergeist *
- Sisters
- Silent Party *
- Daihasei Festival
- Dream Ranker
- Jailbreaker
- First Year
* Anime-exclusive arc
Side Stories
The chronological order of these side stories in relation with the original series and with each other is not always clear.- Volume SS1: Liberal Arts City
- Volume SS2: Ability Demonstration Trip note
- A Certain Vending Machine's Proof of Existence
- A Superfluous Story, or A Certain Incident's End
- Cold Game
- Volume SS3: Stativarius
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Anime
A Certain Scientific Railgun
Level Upper Arc
- Episode 1 Electromaster
- Episode 2 When Working Under a Hot Sun, Rehydration is Essential
- Episode 3 Tokiwadai is Targeted
- Episode 4 Urban Legends
- Episode 5 A Certain Pair of New Trainees
- Episode 6 Everyone is Proactive When It Comes to This
- Episode 7 Abilities and Powers
- Episode 8 Level Upper
- Episode 9 Majority Report
- Episode 10 Silent Majority
- Episode 11 Kiyama-sensei
- Episode 12 AIM Burst
- Episode 13 A Bikini Divides the Eyeline Between Top and Bottom, but a One-Piece Shows Off the Figure so They Only Flatter the Slender
- Episode 14 Special Workshop
Big Spider Arc (Anime-Only)
- Episode 15 Skill Out
- Episode 16 Academy City
Poltergeist Arc (Anime-Only)
- Episode 17 Tsuzuri's Summer Vacation
- Episode 18 Asunaro Park
- Episode 19 Midsummer Festival
- Episode 20 Poltergeist
- Episode 21 Voices
- Episode 22 Level 6 (The One Who Obtains the Power of God Without Being Divine)
- Episode 23 What Is It You See In Your Eyes Right Now?
- Episode 24 Dear My Friends
A Certain Scientific Railgun S
Poltergeist Arc (Anime-Only)
- Episode 1 Railgun
Sisters Arc (Railgun)
- Episode 2 Critical
- Episode 3 Project Radio Noise
- Episode 4 Sisters
- Episode 5 Project Level 6 Shift
- Episode 6 I... Can See All of You
- Episode 7 I... I Want To Be of Help To You, Big Sister
- Episode 8 ITEM
- Episode 9 AIM Stalker
- Episode 10 Meltdowner
- Episode 11 The Vending Machine
- Episode 12 Tree Diagram
- Episode 13 Accelerator
- Episode 14 The Promise
- Episode 15 Tōma Kamijō
- Episode 16 Sisterhood
Silent Party Arc (Anime-Only)
- Episode 17 Study Group
- Episode 18 Moving
- Episode 19 Academic Research Assembly
- Episode 20 Febri
- Episode 21 Darkness
- Episode 22 STUDY
- Episode 23 Revolution's Dawn (Silent Party)
- Episode 24 Eternal Party
A Certain Scientific Railgun T
Daihasei Festival Arc (Railgun)
- Episode 1 Super-Powered (Level 5)
- Episode 2 The Daihasei Festival
- Episode 3 Balloon Hunter
- Episode 4 Tampering
- Episode 5 Trust
- Episode 6 The Battle Begins
- Episode 7 Auribus oculi fideliores sunt (The Eyes Are More Trustworthy Than the Ears)
- Episode 8 Railgun × Mental Out
- Episode 9 Mitori Kōzaku
- Episode 10 Clone Dolly
- Episode 11 Joining the Battle
- Episode 12 Exterior
- Episode 13 SYSTEM (One Who Obtains the Power of God Without Being Divine)
- Episode 14 Dragon Strike (Jaw of the Dragon King)
- Episode 15 Promise
Dream Ranker Arc
- Episode 16 Dream Ranker
- Episode 17 Precognition
- Episode 18 Bust Upper
- Episode 19 Strange Coincidence
- Episode 20 Ha det bra
- Episode 21 Doppelgänger
- Episode 22 Scavenger
- Episode 23 Possession
- Episode 24 Diffusion
- Episode 25 My Dear Friends
