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A Certain Magical Index watch order

Updated October 2026 · 19 entries · release order

Short answer

Watch A Certain Magical Index in release order: A Certain Magical Index → A Certain Magical Index II → A Certain Scientific Railgun S → A Certain Magical Index III → A Certain Scientific Railgun T.

5

main story entries

123

episodes

~49 h

to watch the main story

13 optional entries (recaps, side stories, specials) are marked below. A Certain Dark Item is airing now. Next: Toaru Kagaku no Railgun 4th Season.

Release order

  1. 1
    A Certain Magical IndexMain story

    TV · Fall 2008 · 24 ep · ~9 hours · score 3.5/5

    Watch onBilibili Crunchyroll Hulu Netflix Tubi

  2. 2
    A Certain Magical Index SpecialsSide story · optional, after A Certain Magical Index

    Special · Winter 2009 · 2 ep · ~15 minutes · score 3.3/5

  3. 3
    A Certain Scientific RailgunSide story · optional, after A Certain Magical Index

    TV · Fall 2009 · 24 ep · ~9.5 hours · score 3.8/5

    Watch onBilibili Crunchyroll Hulu Netflix Tubi

  4. 4
    Toaru Kagaku no Railgun: Motto Marutto RailgunSide story · optional, after A Certain Scientific Railgun

    Special · Winter 2010 · 2 ep · ~20 minutes · score 3.3/5

  5. 5
    Toaru Kagaku no Railgun: Entenka no Satsuei Model mo Raku Ja Arimasen wa ne.Side story · optional, after A Certain Scientific Railgun

    OVA · Summer 2010 · 1 ep · ~5 minutes · score 3.2/5

  6. 6
    Toaru Kagaku no Railgun: Misaka-san wa Ima Chuumoku no Mato desu karaSide story · optional, after A Certain Scientific Railgun

    OVA · Summer 2010 · 1 ep · ~35 minutes · score 3.6/5

  7. 7
    A Certain Magical Index IIMain story

    TV · Fall 2010 · 24 ep · ~9 hours · score 3.6/5

    Watch onBilibili Crunchyroll Hulu Netflix Tubi

  8. 8
    A Certain Magical Index II SpecialsSide story · optional, after A Certain Magical Index II

    Special · Winter 2011 · 2 ep · ~20 minutes · score 3.3/5

  9. 9
    A Certain Magical Index: The Miracle of EndymionSide story · optional, after A Certain Magical Index II

    Movie · Winter 2013 · ~1.5 hours · score 3.5/5

    Watch onBilibili Crunchyroll Prime Video YouTube

  10. 10
    A Certain Scientific Railgun SMain story

    TV · Spring 2013 · 24 ep · ~9.5 hours · score 4.0/5

    Watch onBilibili Crunchyroll Hulu Netflix Tubi

  11. 11
    A Certain Scientific Railgun S SpecialsSide story · optional, after A Certain Scientific Railgun S

    Special · Summer 2013 · 2 ep · ~20 minutes · score 3.4/5

  12. 12
    A Certain Magical Index IIIMain story

    TV · Fall 2018 · 26 ep · ~11 hours · score 3.3/5

    Watch onBilibili Crunchyroll Prime Video YouTube

  13. 13
    A Certain Magical Index III SpecialsSide story · optional, after A Certain Magical Index III

    Special · Fall 2018 · 2 ep · ~20 minutes · score 3.1/5

  14. 14
    A Certain Scientific AcceleratorSide story · optional, after A Certain Magical Index

    TV · Summer 2019 · 12 ep · ~5 hours · score 3.5/5

    Watch onBilibili Crunchyroll Netflix Prime Video YouTube

  15. 15
    Toaru Kagaku no Accelerator: Tobidase Ippou-san - Hachamecha KaishingekiSide story · optional, after A Certain Scientific Accelerator

    Special · Fall 2019 · 1 ep · ~10 minutes · score 3.1/5

  16. 16
    A Certain Scientific Railgun TMain story

    TV · Winter 2020 · 25 ep · ~10 hours · score 4.0/5

    Watch onBilibili Crunchyroll

  17. 17
    Toaru Kagaku no Railgun T: Motto Marutto RailgunSide story · optional, after A Certain Scientific Railgun T

    Special · Spring 2020 · 2 ep · ~20 minutes · score 3.3/5

  18. 18
    A Certain Dark Item Airing nowSide story · optional, after A Certain Magical Index

    TV · Fall 2026 · 12 ep · ~5 hours

  19. 19
    Toaru Kagaku no Railgun 4th Season UpcomingMain story

    TV · 12 ep

How long is A Certain Magical Index?

PartEntriesEpisodesWatch time
Main story5123about 49 hours
Everything released18187about 72 hours

Watch time uses each entry's episode length, or a typical length where we don't have one.

Where to watch A Certain Magical Index

  • Bilibili 8 of 19 entries
  • Crunchyroll 8 of 19 entries
  • YouTube 7 of 19 entries
  • Netflix 5 of 19 entries
  • Hulu 4 of 19 entries
  • Tubi 4 of 19 entries
  • Prime Video 3 of 19 entries

Services and regions change; each entry above links its own official pages. Where to watch A Certain Magical Index has the full list, free options included.

Is A Certain Magical Index finished?

No. A Certain Dark Item is airing right now, and Toaru Kagaku no Railgun 4th Season is announced.

Do I need to watch the A Certain Magical Index movies and OVAs?

Optional: A Certain Magical Index Specials, A Certain Scientific Railgun, Toaru Kagaku no Railgun: Motto Marutto Railgun, Toaru Kagaku no Railgun: Entenka no Satsuei Model mo Raku Ja Arimasen wa ne., Toaru Kagaku no Railgun: Misaka-san wa Ima Chuumoku no Mato desu kara, A Certain Magical Index II Specials and 7 more.

How many episodes does A Certain Magical Index have?

The main story is 123 episodes over 5 entries, about 49 hours of viewing. With every optional entry it is 187 episodes (about 72 hours).

Where can I watch A Certain Magical Index?

Officially on Bilibili, Crunchyroll, YouTube, Netflix, Hulu and more. Availability depends on your region; each entry below lists its own services.

Related manga

Order and labels come from the relations in the AnimeHunt catalog (sequel, side story, summary, alternative version). Spot a mistake? Tell us.