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Season guide

A Certain Magical Index: Season 2

24 episodes Premiered Oct 8, 2010 Updated Oct 27, 2026

Role: Meticulous television and film archivist. Task: Produce a JSON object for "A Certain Magical Index" Season 2. Keys: overview (160-220 word summary), primer (array of exactly 4 concise bullet points). Constraints: Use ONLY provided synopsis and sources. No inventing titles, names, dates, etc. No markdown, no asterisks, no headings, no bullet points (within the text, though the primer is an array). Output valid J

Previously on A Certain Magical Index

Season 2 Lore Primer

Key plot threads, lore context, and character stakes you need to remember before diving into this season.

  • ⚡ Index is still a fugitive, and many powerful magical organizations and individuals want to take her to use the books in her memory, eliminating her in the process.
  • ⚡ Character alliances, factions, and personal loyalties undergo significant shifts under escalating stakes.
  • ⚡ Addresses unresolved cliffhangers and thematic mysteries introduced during previous seasons.
  • ⚡ Establishes the primary seasonal conflict that drives serialized character arcs toward the finale.
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Season overview

Role: Meticulous television and film archivist.
Task: Produce a JSON object for "A Certain Magical Index" Season 2.
Keys: overview (160-220 word summary), primer (array of exactly 4 concise bullet points).
Constraints: Use ONLY provided synopsis and sources. No inventing titles, names, dates, etc. No markdown, no asterisks, no headings, no bullet points (within the text, though the primer is an array). Output valid JSON only.
Source Material:
Synopsis: Index is a fugitive. Magical organizations/individuals want her for the books in her memory or to eliminate her. War between organizations is emerging. Index relies on Touma, Misaka, and Academy City friends.
Source [1]: Touma Kamijou is a student in Academy City.
Source [3]: Series is based on light novels by Kazuma Kamachi. Produced by J.C. Staff.
Source [4]: Touma is a student in Academy City (advanced technology). He is a level zero esper but has Imagine Breaker in his right hand (negates any power). He found Index, who was running away.
Source [5]: Stars Atsushi Abe, Yuka Iguchi, Rina Sato. Directed by Hiroshi Nishikiori.
Overview:
Index is currently a fugitive. Numerous powerful magical organizations and individuals are seeking to capture her to utilize the books contained within her memory, while others seek her elimination. As a result of these conflicting interests, a war between these various organizations is beginning to emerge. Throughout these developments, Index can only rely on her friend Touma Kamijou, who has consistently acted as her protector. Touma is a student living in Academy City, a location characterized by highly advanced technology. In addition to Touma, Index finds support from Misaka and other friends from the Academy. Touma is categorized as a level zero esper with no powers, yet he possesses the Imagine Breaker in his right hand, an ability capable of negating any power whatsoever. The narrative follows these characters as they navigate the growing conflict between magical entities and the pursuit of the information held by Index.
Word Count Check (Overview):
"Index is currently a fugitive. Numerous powerful magical organizations and individuals are seeking to capture her to utilize the books contained within her memory, while others seek her elimination. As a result of these conflicting interests, a war between these various organizations is beginning to emerge. Throughout these developments, Index can only rely on her friend Touma Kamijou, who has consistently acted as her protector. Touma is a student living in Academy City, a location characterized by highly advanced technology. In addition to Tou

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Season 2 Episodes

Episode Guide

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Season 2 Progress Shield

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Season 2: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

17%
83%
Mytharc (4): Crucial lore & season climaxes
Core (20): Character development & subplots
Side Quest (0): Standalone / filler
S2·E1 Mytharc

The Last Day (August 31)

Oct 8, 2010 · 25 min

As summer ends, Toma desperately tries to catch up on homework—but that’s totally out of the question once a magician named Yamisaka kidnaps Index. As Toma tries to rescue his frie

S2·E2 Core

The Book of Law

Oct 15, 2010 · 25 min

The Book of Law is an encrypted grimoire that only one nun has the skills to decipher—and it’s gone missing! If its magic is ever used, it will bring about all sorts of ruin. Now,

S2·E3 Core

The Amakusa Church

Oct 22, 2010 · 25 min

The battle over Orsola, the only nun who can read the Book of Law, continues as Toma is forced to act as an unwitting decoy. The Amakusa clash with church representatives, but the

S2·E4 Core

Sheol Fear (Voice of the Magicbane)

Oct 29, 2010 · 25 min

With Orsola taken hostage, Toma and his gang take the battle to the church. There, Index unleashes a mighty spell. Things look bleak for the Roman Orthodox, but their willingness t

S2·E5 Core

Lotus Wand

Nov 5, 2010 · 25 min

The Roman Orthodox nuns continue their attack as Orsola risks everything to have Index decipher the Book of Law. The infamous grimoire could help them finally defeat their enemies—

S2·E6 Core

Remnant (Wreckage)

Nov 12, 2010 · 25 min

A high-tech suitcase is stolen from couriers, and Kuroko is on the job! But the contents of the package may prove to be more dangerous than any robbers or petty crooks. Also, what

S2·E7 Core

Move Point (Coordinate Relocation)

Nov 19, 2010 · 25 min

Mikoto’s clones use their telepathic network to enlist Misaka 10032 to aid them in stopping Musujime from rebuilding the Tree Diagram in an effort to find out why humans are the on

S2·E8 Core

The Daihasei Festival

Nov 26, 2010 · 25 min

It’s the Daihasei Festival, and everyone’s parents are in town! As Toma and Mikoto compete against each other in various events, a Roman Orthodox magician and her assistant negotia

S2·E9 Core

Route Disturb (Pursuit Inhibited)

Dec 3, 2010 · 25 min

As Toma and his group try to track down Oriana, they discover that a “Shorthand”—a specialized spell that operates on its own once being cast—is shorting out their magic. But befor

S2·E10 Core

Shorthand (Stenographic Sourebook)

Dec 10, 2010 · 25 min

With the Shorthand cancelled, Stiyl uses his magic to locate Oriana, causing a fight to erupt. In London, Laura learns that Oriana’s deal might not be for the Stab Sword, but for s

S2·E11 Mytharc

Stab Sword

Dec 17, 2010 · 25 min

Tsuchimikado’s location spell backfires and leads Oriana straight to him, resulting an epic showdown. But he’s not the only one exposed to Oriana’s magic: Himegami feels the force

S2·E12 Core

Belvedere (The Observatory)

Dec 24, 2010 · 25 min

Toma and Tsuchimikado investigate the history of a sacred artifact as they try to figure out what Oriana’s plan is. When they discover they have only until nightfall to stop her fr

S2·E13 Core

Croce di Pietro (Apostolic Cross)

Jan 7, 2011 · 25 min

As Toma and the others come close to beating Oriana, the motivations behind her actions are finally revealed. But taking out Oriana might not be enough to stop her plot from reachi

S2·E14 Core

City of Water

Jan 14, 2011 · 25 min

After winning a trip to Italy, Toma and Index run across a few old acquaintances. But wherever these two go, disaster is sure to follow—this time in the form of assassins!

S2·E15 Core

Queen's Fleet

Jan 21, 2011 · 25 min

Agnese makes a deal with Toma and Orsola that guarantees their safe escape from the Roman Orthodox ship—so long as they take Sisters Angelene and Lucia with them. As they search fo

S2·E16 Core

Rosary of the Appointed Time

Jan 28, 2011 · 25 min

Toma goes head-to-head with Bishop Biagio during an attempt to rescue Agnese. As the battle rages, the Queen of the Adriatic Sea is revealed to be a ship that can completely destro

S2·E17 Core

Penalty Game

Feb 4, 2011 · 25 min

Mikoto convinces Toma to sign up for a couples cell phone contract with her so she can get an adorable promotional item—but how far are the two willing to take the ruse before they

S2·E18 Core

Serial Number (Specimen Number)

Feb 11, 2011 · 25 min

Laura is confronted with a confidential memo during her bath time, Toma buys Mikasa 10032 a piece of jewelry, and many old enemies come together in the search for Last Order.

S2·E19 Core

The Researcher (Amata Kihara)

Feb 18, 2011 · 25 min

Accelerator attempts to make amends for his past by doing a few good deeds, but ends up attacked by a group led by someone from his past. Meanwhile, Toma discovers strange goings-o

S2·E20 Core

Hound Dog (Hound Squad)

Feb 25, 2011 · 25 min

Accelerator manages to escape from Kihara, taking Index with him. Elsewhere, Toma and Last Order are on the run from Hound Dog—but the real threat to their lives may come from Vent

S2·E21 Core

Testament (Learning Device)

Mar 4, 2011 · 25 min

When Accelerator deduces who is pulling all the strings in Academy City, no person—or building—is safe from his rage. Meanwhile, Toma goes on a mad dash through the city looking fo

S2·E22 Core

The Divine Retribution Spell

Mar 11, 2011 · 25 min

In order to save Last Order, will Accelerator sacrifice himself? Vento’s past is revealed, Toma delivers a very Toma speech, and Index sings a song as the battle rages on in Academ

S2·E23 Mytharc

Prewar

Mar 25, 2011 · 25 min

Accelerator is injured, but even in that state he’s approached by a city-employed organization that wants to recruit him. As rumors of an impending war spread throughout Academy Ci

S2·E24 Mytharc

Skill Out (Armed Gang)

Apr 1, 2011 · 25 min

GROUP continues to order Accelerator around by giving him an assignment to kill Misuzu—which leads to Accelerator protecting the woman just to spite the organization when Skill Out

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