A Certain Magical Index: The Miracle of Endymion
The Miracle of Endymion is a side-story feature for viewers familiar with the early Index cast.
When to watch: After Index II; a convenient place is before Railgun S.
animesenseiA Certain Magical Index Watch Order: Railgun & Accelerator
Choose a Toaru watch order across Index, Railgun, Accelerator and ITEM. Follow whole seasons, place the Endymion movie, or try a clearly labeled Railgun-first route.
Start here
Recommended starting point
A Certain Magical Index
Start with A Certain Magical Index Season 1, then the first A Certain Scientific Railgun season. Index introduces the wider setting; Railgun follows Misaka and another side of Academy City.
Open series sheetRecommended watch order
For a first watch, keep whole seasons in this release-order TV route. Overlapping events do not require switching series every few episodes. The film and separate spin-offs are placed in the next section.
A Certain Magical Index
Index Season 1 only — all 24 episodes
Begin the main Index introduction.
Open series sheetA Certain Scientific Railgun
Railgun Season 1 only — all 24 episodes
Explore Misaka’s side of the same setting.
Open series sheetA Certain Magical Index II
Index II — all 24 episodes
Continue the Index branch.
A Certain Scientific Railgun S
Railgun S — all 24 episodes
Continue Railgun after its first season; it offers another perspective on material familiar to Index viewers.
A Certain Magical Index III
Index III — all 26 episodes
Continue Index without interleaving its episodes with Railgun T.
A Certain Scientific Railgun T
Railgun T — all 25 episodes
Continue the Railgun branch after S, with the earlier Index context already available.
Alternative: Railgun-first, character-focused route
Best for: Viewers primarily interested in Misaka and Railgun’s cast.
This route changes which perspective you see first. Finish Railgun I and S as complete blocks, then start Index from its own first episode. It is not a literal chronological merge of every series.
A Certain Scientific Railgun S
Railgun S
Finish its second season before switching lead casts.
A Certain Magical Index
Index Season 1
Restart this branch at episode 1, including material that overlaps with Railgun.
Open series sheetA Certain Magical Index II
Index II
Continue Index’s second season.
A Certain Magical Index III
Index III
Complete the third Index TV block.
A Certain Scientific Railgun T
Railgun T
Return to Railgun with the wider Index context.
How the series connect
Movie and separate spin-offs
These releases expand the setting without replacing Index II, Railgun S or another numbered season.
A Certain Scientific Accelerator
A Certain Scientific Accelerator follows its title character in an independent TV block.
When to watch: After Index Season 1 at minimum; after Index II is an easy place in the recommended route.
A Certain Item of Dark Side
A Certain Item of Dark Side follows the ITEM group rather than continuing the next numbered Index season.
When to watch: Optional after Index II and Railgun S for familiarity with the setting and cast.
Open series sheetFollowing later Railgun releases
Keep the Railgun branch’s own numbering even when the wider franchise has other projects.
A Certain Scientific Railgun — Fourth Season
The fourth Railgun season belongs after Railgun T; it is not a new entry point that replaces the first three seasons.
When to watch: After Railgun T, following its episodes when released.
Good to know
What is the simplest Index and Railgun order?
Index I → Railgun I → Index II → Railgun S → Index III → Railgun T. Add Endymion after Index II and Accelerator after you know its character from Index.
Can I watch Railgun first?
Yes, if Misaka’s story is your main interest. The alternative below starts with Railgun I and S, then returns to Index. Overlapping events reveal context in a different order; it is an entry preference rather than strict chronology.
Do I need an episode-by-episode chronological list?
No. It interrupts season arcs and can change when information is revealed. Whole-season routes are easier to follow and avoid treating overlapping perspectives as identical scenes.
Are Index and Railgun alternate universes?
They share the setting and some events, with different lead characters and perspectives. Keep each branch’s season order while choosing how to alternate the full seasons.
Is Accelerator required before Railgun T?
It is an optional spin-off rather than a replacement for a Railgun season. Watch its full block after getting the relevant character introduction from Index.
Updates
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