原作Gensaku

A Certain Scientific Railgun

73 episodes 49 canon 11 filler 7 mixed 6 anime canon

★ 7.4 TMDB · 139 votes

11 filler episodes — about 4 hours you never have to watch.

Classifications verified 2026-10-17 · 4 episode(s) under review

Watched 0 / 73 episodes

Academy City is a high-tech metropolis where students develop psychic esper abilities. Mikoto Misaka, one of only seven Level 5 espers and nicknamed the Railgun for her devastating electromagnetic attacks, balances school life at the elite Tokiwadai Middle School with the darker side of the city, alongside her roommate Kuroko Shirai, an officer of the student disciplinary committee Judgment. A Certain Scientific…

First aired 2009 · Status: finished · Japanese title: とある科学の超電磁砲

A Certain Scientific Railgun: the quick answer

Skip 11 filler episode(s) (3, 13–14, 17–19, 42–45, 48) — about 4 hours saved. Mixed episodes (2, 20, 25) blend canon and filler; watch them for the canon scenes. Episodes 15–16, 21–24 are anime canon — original arcs, not in the manga; later episodes build on them, so watch them too.

Cross-checked against multiple independent sources · last verified 2026-10-17 · 4 episode(s) under review. How we classify

Season 1

24 eps · 10 canon · 6 filler · 2 mixed · 6 anime canon
  1. #1ElectromasterCanon Oct 2, 2009A Certain Scientific Railgun episode 1 is canon — it adapts the original story.
  2. #2When Working Under a Hot Sun, Rehydration Is EssentialMixed Oct 9, 2009A Certain Scientific Railgun episode 2 is mixed — part canon, part filler; watch if you want the canon scenes.
  3. #3Tokiwadai Is TargetedFiller Oct 16, 2009A Certain Scientific Railgun episode 3 is filler — safe to skip.
  4. #4Urban LegendsCanon Oct 23, 2009A Certain Scientific Railgun episode 4 is canon — it adapts the original story.
  5. #5A Certain Pair of New TraineesCanon Oct 30, 2009A Certain Scientific Railgun episode 5 is canon — it adapts the original story.
  6. #6Everyone is Proactive When it Comes to ThisCanon Nov 6, 2009A Certain Scientific Railgun episode 6 is canon — it adapts the original story.
  7. #7Abilities and PowersCanon Nov 13, 2009A Certain Scientific Railgun episode 7 is canon — it adapts the original story.
  8. #8Level UpperCanon Nov 20, 2009A Certain Scientific Railgun episode 8 is canon — it adapts the original story.
  9. #9Majority ReportCanon Nov 27, 2009A Certain Scientific Railgun episode 9 is canon — it adapts the original story.
  10. #10Silent MajorityCanon Dec 4, 2009A Certain Scientific Railgun episode 10 is canon — it adapts the original story.
  11. #11Dr. KiyamaCanon Dec 11, 2009A Certain Scientific Railgun episode 11 is canon — it adapts the original story.
  12. #12AIM BurstCanon Dec 18, 2009A Certain Scientific Railgun episode 12 is canon — it adapts the original story.
  13. #13A Bikini Divides the Eyeline Between Top and Bottom, But a One-piece Shows Off the Figure, So They Only Flatter the SlenderFiller Dec 25, 2009A Certain Scientific Railgun episode 13 is filler — safe to skip.
  14. #14Special WorkshopFiller Jan 8, 2010A Certain Scientific Railgun episode 14 is filler — safe to skip.
  15. #15Skill OutAnime Canon Jan 15, 2010A Certain Scientific Railgun episode 15 is anime canon — an original arc: not in the manga, but part of the anime's storyline; later episodes build on it.
  16. #16Academy CityAnime Canon Jan 22, 2010A Certain Scientific Railgun episode 16 is anime canon — an original arc: not in the manga, but part of the anime's storyline; later episodes build on it.
  17. #17Tsuzuri's Summer VacationFiller Jan 29, 2010A Certain Scientific Railgun episode 17 is filler — safe to skip.
  18. #18Asunaro ParkFiller Feb 6, 2010A Certain Scientific Railgun episode 18 is filler — safe to skip.
  19. #19Midsummer FestivalFiller Feb 12, 2010A Certain Scientific Railgun episode 19 is filler — safe to skip.
  20. #20PoltergeistMixed Feb 19, 2010A Certain Scientific Railgun episode 20 is mixed — part canon, part filler; watch if you want the canon scenes.
  21. #21VoicesAnime Canon Feb 26, 2010A Certain Scientific Railgun episode 21 is anime canon — an original arc: not in the manga, but part of the anime's storyline; later episodes build on it.
  22. #22Level 6Anime Canon Mar 5, 2010A Certain Scientific Railgun episode 22 is anime canon — an original arc: not in the manga, but part of the anime's storyline; later episodes build on it.
  23. #23What Is It You See in Your Eyes Right Now?Anime Canon Mar 12, 2010A Certain Scientific Railgun episode 23 is anime canon — an original arc: not in the manga, but part of the anime's storyline; later episodes build on it.
  24. #24Dear My FriendsAnime Canon Mar 20, 2010A Certain Scientific Railgun episode 24 is anime canon — an original arc: not in the manga, but part of the anime's storyline; later episodes build on it.

Season 2

24 eps · 14 canon · 5 filler · 5 mixed
  1. #25RailgunMixed Apr 12, 2013A Certain Scientific Railgun episode 25 is mixed — part canon, part filler; watch if you want the canon scenes.
  2. #26CriticalCanon Apr 19, 2013A Certain Scientific Railgun episode 26 is canon — it adapts the original story.
  3. #27Project Radio NoiseCanon Apr 26, 2013A Certain Scientific Railgun episode 27 is canon — it adapts the original story.
  4. #28SistersCanon May 3, 2013A Certain Scientific Railgun episode 28 is canon — it adapts the original story.
  5. #29Project Level 6 ShiftCanon May 10, 2013A Certain Scientific Railgun episode 29 is canon — it adapts the original story.
  6. #30I... Can See All of YouCanon May 17, 2013A Certain Scientific Railgun episode 30 is canon — it adapts the original story.
  7. #31I... I Want to Be of Help To You, SissyMixedMay 24, 2013Under reviewA Certain Scientific Railgun episode 31 is under review — sources disagree, so we show it as mixed rather than guess.
  8. #32ITEMCanon May 31, 2013A Certain Scientific Railgun episode 32 is canon — it adapts the original story.
  9. #33AIM StalkerCanon Jun 7, 2013A Certain Scientific Railgun episode 33 is canon — it adapts the original story.
  10. #34MeltdownerCanonJun 14, 2013UnreviewedA Certain Scientific Railgun episode 34 is canon — it adapts the original story.
  11. #35The Vending MachineCanon Jun 21, 2013A Certain Scientific Railgun episode 35 is canon — it adapts the original story.
  12. #36Tree DiagramCanon Jun 28, 2013A Certain Scientific Railgun episode 36 is canon — it adapts the original story.
  13. #37AcceleratorCanon Jul 5, 2013A Certain Scientific Railgun episode 37 is canon — it adapts the original story.
  14. #38The PromiseCanon Jul 12, 2013A Certain Scientific Railgun episode 38 is canon — it adapts the original story.
  15. #39Kamijo TomaCanon Jul 19, 2013A Certain Scientific Railgun episode 39 is canon — it adapts the original story.
  16. #40SisterhoodCanon Jul 26, 2013A Certain Scientific Railgun episode 40 is canon — it adapts the original story.
  17. #41Study GroupMixedAug 2, 2013Under reviewA Certain Scientific Railgun episode 41 is under review — sources disagree, so we show it as mixed rather than guess.
  18. #42MovingFiller Aug 16, 2013A Certain Scientific Railgun episode 42 is filler — safe to skip.
  19. #43Academic Reach AssemblyFiller Aug 23, 2013A Certain Scientific Railgun episode 43 is filler — safe to skip.
  20. #44FebriFiller Aug 23, 2013A Certain Scientific Railgun episode 44 is filler — safe to skip.
  21. #45DarknessFiller Aug 30, 2013A Certain Scientific Railgun episode 45 is filler — safe to skip.
  22. #46STUDYMixedSep 6, 2013Under reviewA Certain Scientific Railgun episode 46 is under review — sources disagree, so we show it as mixed rather than guess.
  23. #47Silent PartyMixedSep 13, 2013Under reviewA Certain Scientific Railgun episode 47 is under review — sources disagree, so we show it as mixed rather than guess.
  24. #48Eternal PartyFiller Sep 20, 2013A Certain Scientific Railgun episode 48 is filler — safe to skip.

Season 3

25 eps · 25 canon · 0 filler · 0 mixed
  1. #49Super-powered (Level 5)Canon Jan 10, 2020A Certain Scientific Railgun episode 49 is canon — it adapts the original story.
  2. #50The Daihasei FestivalCanon Jan 17, 2020A Certain Scientific Railgun episode 50 is canon — it adapts the original story.
  3. #51Balloon HunterCanon Jan 24, 2020A Certain Scientific Railgun episode 51 is canon — it adapts the original story.
  4. #52TamperingCanon Jan 31, 2020A Certain Scientific Railgun episode 52 is canon — it adapts the original story.
  5. #53TrustCanon Feb 7, 2020A Certain Scientific Railgun episode 53 is canon — it adapts the original story.
  6. #54The Battle BeginsCanon Feb 14, 2020A Certain Scientific Railgun episode 54 is canon — it adapts the original story.
  7. #55Auribus oculi fideliores suntCanon Feb 28, 2020A Certain Scientific Railgun episode 55 is canon — it adapts the original story.
  8. #56Railgun ✕ Mental OutCanon Mar 20, 2020A Certain Scientific Railgun episode 56 is canon — it adapts the original story.
  9. #57Kozaku MitoriCanon Mar 27, 2020A Certain Scientific Railgun episode 57 is canon — it adapts the original story.
  10. #58Clone DollyCanon Apr 3, 2020A Certain Scientific Railgun episode 58 is canon — it adapts the original story.
  11. #59Joining the BattleCanon Apr 10, 2020A Certain Scientific Railgun episode 59 is canon — it adapts the original story.
  12. #60ExteriorCanon Apr 17, 2020A Certain Scientific Railgun episode 60 is canon — it adapts the original story.
  13. #61SYSTEM (Those Who Arrive at Heaven's Will in an Only Human Body)Canon May 1, 2020A Certain Scientific Railgun episode 61 is canon — it adapts the original story.
  14. #62Dragon Strike (Jaw of the Dragon King)Canon May 15, 2020A Certain Scientific Railgun episode 62 is canon — it adapts the original story.
  15. #63PromiseCanon May 22, 2020A Certain Scientific Railgun episode 63 is canon — it adapts the original story.
  16. #64Dream RankerCanon Jul 24, 2020A Certain Scientific Railgun episode 64 is canon — it adapts the original story.
  17. #65PrecognitionCanon Jul 31, 2020A Certain Scientific Railgun episode 65 is canon — it adapts the original story.
  18. #66Bust UpperCanon Aug 7, 2020A Certain Scientific Railgun episode 66 is canon — it adapts the original story.
  19. #67Strange CoincidenceCanon Aug 14, 2020A Certain Scientific Railgun episode 67 is canon — it adapts the original story.
  20. #68Ha Det BraCanon Aug 21, 2020A Certain Scientific Railgun episode 68 is canon — it adapts the original story.
  21. #69DoppelgangerCanon Aug 28, 2020A Certain Scientific Railgun episode 69 is canon — it adapts the original story.
  22. #70ScavengerCanon Sep 4, 2020A Certain Scientific Railgun episode 70 is canon — it adapts the original story.
  23. #71PossessionCanon Sep 11, 2020A Certain Scientific Railgun episode 71 is canon — it adapts the original story.
  24. #72DiffusionCanon Sep 18, 2020A Certain Scientific Railgun episode 72 is canon — it adapts the original story.
  25. #73My Dear FriendsCanon Sep 25, 2020A Certain Scientific Railgun episode 73 is canon — it adapts the original story.

Under review

4 episode(s) have conflicting sources. We show them as mixed rather than guessing — never auto-labeled filler.

Common questions

Which A Certain Scientific Railgun episodes are filler?

11 of the 73 A Certain Scientific Railgun episodes are verified filler: episode 3, 13–14, 17–19, 42–45, 48.

Can I skip the filler episodes in A Certain Scientific Railgun?

Yes — you can skip 11 verified filler episode(s) of A Certain Scientific Railgun: episode 3, 13–14, 17–19, 42–45, 48. Skipping them saves about 4 hours. Mixed episodes (part canon, part filler) are worth watching for their canon scenes: episode 2, 20, 25.

How many filler episodes does A Certain Scientific Railgun have?

A Certain Scientific Railgun has 11 verified filler episodes out of 73 total (15%). 49 episodes are canon and 7 are mixed (part canon, part filler). 6 are anime canon (an original arc that later episodes build on).