Since ''LightNovel/ACertainMagicalIndex'' is very long and its details vary in its various media, this recap will group by story arcs, taking note of the differences between the light novel, anime, and manga adaptations. See [[Recap/ACertainScientificRailgun here]] for ''Manga/ACertainScientificRailgun'''s recap page.

'''Warning!''' Recap pages do not get spoiler tags. All spoilers on these pages will be '''unmarked'''. It should also be noted that a vast majority of the recap pages seen for the light novels here use tweaked versions of the recap pages found on the [[http://toarumajutsunoindex.wikia.com/wiki/Toaru_Majutsu_no_Index_Wiki wiki]] for the ''A Certain Magical Index'' series.

!!Light Novels

[[foldercontrol]]

[[folder:Original Series (Part 1)]]
# Vol.1 [[Recap/ACertainMagicalIndexArc1Index Index]]
# Vol.2 [[Recap/ACertainMagicalIndexArc2DeepBlood Deep Blood]]
# Vol.3 [[Recap/ACertainMagicalIndexArc3Sisters Sisters]]
# Vol.4 [[Recap/ACertainMagicalIndexArc4AngelFall Angel Fall]]
# Vol.5 [[Recap/ACertainMagicalIndexArc5ThreeStories Three Stories]]
# Vol.6 [[Recap/ACertainMagicalIndexArc6HyoukaKazakiri Hyouka Kazakiri]]
# Vol.7 [[Recap/ACertainMagicalIndexArc7OrsolaAquinasRescue Orsola Aquinas Rescue]]
# Vol.8 [[Recap/ACertainMagicalIndexArc8TreeDiagramRemnant Tree Diagram Remnant]]
# Vol.9-10 [[Recap/ACertainMagicalIndexArc9DaihaseiFestival Daihasei Festival]]
# Vol.11 [[Recap/ACertainMagicalIndexArc10TheQueenOfTheAdriaticSea The Queen Of The Adriatic Sea]]
# Vol.12-13 [[Recap/ACertainMagicalIndexArc11AcademyCityInvasion Academy City Invasion]]
# SS.1 [[Recap/ACertainMagicalIndexArc12SkillOutUprising Skill-Out Uprising]]
# Vol.14 [[Recap/ACertainMagicalIndexArc13DocumentOfConstantine Document Of Constantine]]
# Vol.15 [[Recap/ACertainMagicalIndexArc14BattleRoyale Battle Royale]]
# Vol.16 [[Recap/ACertainMagicalIndexArc15AcquaOfTheBack Acqua Of The Back]]
# SS.2 [[Recap/ACertainMagicalIndexArc16GemstoneMining Gemstone Mining]]
# Vol.17-18 [[Recap/ACertainMagicalIndexArc17BritishRoyalFamily British Royal Family]]
# Vol.19 [[Recap/ACertainMagicalIndexArc18DRAGON DRAGON]]
# Vol.20-22 [[Recap/ACertainMagicalIndexArc19WorldWarIII World War III]]
[[/folder]]

[[folder:New Testament (Part 2)]]
# Vol.1 [[Recap/ACertainMagicalIndexArc20Freshmen Freshmen]]
# Vol.2 [[Recap/ACertainMagicalIndexArc21Homecoming Homecoming]]
# Vol.3 [[Recap/ACertainMagicalIndexArc22HawaiiInvasion Hawaii Invasion]]
# Vol.4 [[Recap/ACertainMagicalIndexArc23BaggageCity Baggage City]]
# Vol.5-6 [[Recap/ACertainMagicalIndexArc24IchihanaranFestival Ichihanaran Festival]]
# Vol.7 [[Recap/ACertainMagicalIndexArc25AgitateHalation Agitate Halation]]
# Vol.8-10 [[Recap/ACertainMagicalIndexArc26MagicGodOthinus Magic God Othinus]]
# Vol.11 [[Recap/ACertainMagicalIndexArc27MentalOut Mental Out]]
# Vol.12 [[Recap/ACertainMagicalIndexArc28StGermain St. Germain]]
# Vol.13 [[Recap/ACertainMagicalIndexArc29MagicGodInvasion Magic God Invasion]]
# Vol.14 [[Recap/ACertainMagicalIndexArc30WorldRejecter World Rejecter]]
# Vol.15 [[Recap/ACertainMagicalIndexArc31Salome Salome]]
# Vol.16 [[Recap/ACertainMagicalIndexArc32Elements Elements]]
# Vol.17 [[Recap/ACertainMagicalIndexArc33KamisatoKakeruRescue Kamisato Kakeru Rescue]]
# Vol.18 [[Recap/ACertainMagicalIndexArc34AleisterCrowley Aleister Crowley]]
[[/folder]]

[[folder:Side Stories]]
The chronological order of these side stories in relation with the original series and with each other is not clear.
# [[Recap/ACertainMagicalIndexSS1SP SP]]
# [[Recap/ACertainMagicalIndexSS2NorseMythology Norse Mythology]]
# [[Recap/ACertainMagicalIndexSS3RoadToEndymion Road To Endymion]]
# [[Recap/ACertainMagicalIndexSS4MiracleOfEndymion Miracle Of Endymion]]
# [[Recap/ACertainMagicalIndexSS5NecessariusSpecialEntranceExam Necessarius Special Entrance Exam]]
# [[Recap/ACertainMagicalIndexSS6LoveLetterCompetition Love Letter Competition]]
# [[Recap/ACertainMagicalIndexSS7NewTestamentSS New Testament SS]]
[[/folder]]

!!Anime Adaptation

[[folder:Season 1]]

The first anime season that covers volumes 1 through 6 of the original light novel series.
----

!!!Vol. 1: Index Arc
* Episode 1: Academy City
* Episode 2: The Witch Hunting King (Innocentius)
* Episode 3: The Church of Necessary Evil (Necessarius)
* Episode 4: Perfect Memory Ability
* Episode 5: 12 o'clock (Limit)
* Episode 6: Fantasy Killer (Imagine Breaker)

!!!Vol. 2: Deep Blood Arc
* Episode 7: Misawa Cram School (Science Cult)
* Episode 8: Gold Transmutation (Ars Magna)
* Episode 9: Vampire Killer (Deep Blood)

!!!Vol. 3: Sisters Arc
* Episode 10: Big Sister (Mikoto Misaka)
* Episode 11: Sisters (Sisters)
* Episode 12: Absolute Power (Level 6)
* Episode 13: One Way (Accelerator)
* Episode 14: Strongest vs. Weakest (Weakest vs. Strongest)

!!!Vol. 4: Angel Fall Arc
* Episode 15: Angel Fall (Angel Fall)
* Episode 16: Father (Tōya Kamijō)
* Episode 17: Archangel (The Power of God)

!!!Vol. 5: Three Stories Arc
* Episode 18: Impostor (Replica)
* Episode 19: The End (Last Order)
* Episode 20: Final Signal (Virus Code)

!!!Vol. 6: Kazakiri Hyouka Arc
* Episode 21: Identity Unknown (Counter Stop)
* Episode 22: Statue (Golem)
* Episode 23: Hyōka Kazakiri (Friends)
* Episode 24: Imaginary Number School District - Five-Element Agency

[[/folder]]

[[folder:Season 2]]

The second anime season that covers volumes 7 through 13 of the original light novel series. The season starts off with the one volume 5 story that was skipped over, and ends with a side-story that takes place after volume 13.
----

!!!Vol. 5: Three Stories Arc
* Episode 1: August 31st (The Last Day)

!!!Vol. 7: Orsola Aquinas Rescue Arc
* Episode 2: The Book of the Law
* Episode 3: The Amakusa Church
* Episode 4: Voice of the Magicbane (Sheol Fear)
* Episode 5: Lotus Wand

!!!Vol. 8: Tree Diagram Remnant Arc
* Episode 6: Wreckage (Remnant)
* Episode 7: Coordinate Relocation (Move Point)

!!!Vol. 9-10: Daihasei Festival Arc
* Episode 8: The Daihasei Festival
* Episode 9: Pursuit Inhibited (Route Disturb)
* Episode 10: Stenographic Sourcebook (Shorthand)
* Episode 11: Stab Sword
* Episode 12: The Observatory (Belvedere)
* Episode 13: Apostolic Cross (Croce di Pietro)

!!!Vol. 11: The Queen Of The Adriatic Sea Arc
* Episode 14: City of Water
* Episode 15: Queen's Fleet
* Episode 16: Rosary of the Appointed Time

!!!Vol. 12-13: Academy City Invasion Arc
* Episode 17: Penalty Game
* Episode 18: Specimen Number (Serial Number)
* Episode 19: Amata Kihara (The Researcher)
* Episode 20: Hound Squad (Hound Dog)
* Episode 21: Learning Device (Testament)
* Episode 22: The Divine Retribution Spell

!!!Side-Story: Skill-Out Uprising Arc
* Episode 23: Prewar
* Episode 24: Armed Gang (Skill-Out)

[[/folder]]

----