Unusual Chapter Numbers

"Chapters in books are usually given the cardinal numbers 1, 2, 3, 4, 5, 6 and so on. But I have decided to give my chapters prime numbers 2, 3, 5, 7, 11, 13 and so on because I like prime numbers."

Doing odd — no, peculiar things with your chapter numbers. Which can be either odd or even. Or fractional. Or even stranger things, up to and including non-numeric. Or they can be put out of order — counting down from, say, 10 to 1 is perhaps the simplest. Representing them with formulas, in binary, or in other non-standard formats works, too.

Compare Idiosyncratic Episode Naming, Episode 0: The Beginning. Compare and contrast Un Installment.


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    Anime and Manga 
  • Bleach: Some flashback chapters use negative chapter numbers:
    • Chapter -0.8 covers the very first meeting between Ichigo, Chad, Keigo and Mizuiro. It's told from Mizuiro's point-of-view.
    • Chapter -17 covers how Renji, Kira, Hinamori and Rukia met as Academy students and how Renji, Hinamori and Kira were put into an advanced class study group while Rukia was left behind in a lower achieving class. It also introduces Hitsugaya as a young child who refuses to consider the validity of training to become a shinigami.
    • Chapter -12.5 covers a past event where Aizen, Hinamori and Rangiku arrange a birthday surprise for Hitsugaya and reveals that Gin gave Rangiku her birth date.
    • Chapter "0 Side A" covers the days leading up to Chapter 1, focusing on Ichigo's feelings of powerlessness to help those in trouble, such as the little ghost girl.
    • Chapter "0 Side B" covers the days leading up to Chapter 1, focusing on both Rukia receiving her assignment to patrol Karakura Town and Renji receiving his new promotion to Sixth Squad Lieutenant.
    • Chapter -16 is Hitsugaya's back story, revealing how he met Rangiku and why he decided to become a shinigami. It picks up five years after the events in Chapter -17. The chapter was also written to promote the second film which is about Hitsugaya's back story.
    • Chapters -108 to -97 cover the Turn Back the Pendulum mini-arc. It covers a nine year period 110-101 years before Chapter 1 and reveals the truth behind Urahara's exile and who the Visoreds really are.
    • Imaginary Number 1 is a chapter detailing two Espada having been sent to Hell after their deaths in the canon as an advertisement for the fourth film, which is set in Hell.
  • School Rumble plot chapters are labeled #1, #2 and so on, but chapters about minor characters are labeled with â™­. There are also a few 'natural' chapters.
  • Nana has a book of extra episodes numbered "7.8": this is both a joke on the two protagonists' names (Nana = 7 and Hachi = 8 in Japanese) and a way to say it is meant to be read after volume 7 and before volume 8, it spite of this being published some time after these.
  • Invoked in ADV Films' dub of Neon Genesis Evangelion; the tapes were referred to as "Genesis 0:1", "Genesis 0:2", etc. up to "Genesis 0:13".
  • Recap episodes of Code Geass were numbered (number of the previous episode).5 with the next episode continuing onto the next whole number.
  • The Saiyuki main-story series (Gensomaden, Reload, and Blast) have normally-numbered chapters organized into numbered "acts"—roughly equivalent to plot arcs. There are fractional numbered acts for omakes, and full-chapter flashbacks are listed as "act.xx".
  • In Soul Eater, the three one-shot introductions for each of the three main weapon and meister pairs were, in the collected paperback, retroactively given the chapter numbers .1, .2, and .3.

    Comic Books 
  • The first five issues of Fun with Milk & Cheese were numbered #1, Other #1, Third #1, Fourth #1, and "First Second Issue."
  • Zero Hour numbered the main storyline backward because it was counting down to... Zero Hour. Various titles in The DCU had tie-in issues numbered #0; most significantly, the issues of Legion of Super-Heroes and Legionnaires that began the Legion's first full-fledged reboot.
    • Countdown to Final Crisis did the same thing, counting backwards from 52.
    • After the New 52 reboot, one special themed month had #0 issues for all DCU titles, telling stories of the characters' origins or early careers.
  • This happens occasionally in long running comics that have been restarted various times. Via loopholes in how volumes are decided the editors can shuffle the numbers around to celebrate milestones. For example The Amazing Spider-Man (Vol. 2) #59 was renamed {The Amazing Spider-Man} #500 (and the following issues kept the 500+ numbers). Naturally this can be very very confusing, especially when the numbering is reset multiple times in relatively short order.
  • DC One Million saw every DCU title jump to #1,000,000 for an issue as the far future DCU interacted with the present day.
  • Groo the Wanderer has had at least three "#1" issues (because it changed publishers, and because "#1" sells better). Original author Sergio Aragonés claimed that every issue he wrote was #1.
  • In a similar manner to DC's original "zero issues", which were Flashbacks to origin stories, Marvel had a Fifth Week Event of stories set before the characters' origins (Peter Parker as a kid; mutants before the founding of the X-Men, etc), numbered "#-1".
  • Long after both events (which it wasn't around for at the time), Booster Gold had a Zero issue (tying into Zero Hour and restating his origin) and a One Million issue (introducing Booster's 1M counterpart, Peter Platinum).
  • Given all this, it's almost not unusual that the Earth X trilogy featured the first issue as "0", the second through thirteenth as "1-12", and the last as "X". (With a number of titled but un-numbered comics in between during the runs of Universe and Paradise X.
  • In 1999, the publisher of 2000 AD decided to stop doing annuals in favour of triple-length December issues, which are cheaper and sell better. Each of these special issues has been given the number of the next year, starting with December 1999's 'prog 2000' and continuing through prog 2001 (December 2000), prog 2002 (December 2001), etc. Naturally, the number of the first issue of January directly follows that of the last issue of November, but the stories in the December issue still fall between them. This was all quietly ignored when the regular numbering reached 2000.
  • Marvel at one point had "Point One" issues, standalone stories that established the characters' status quo, published as, for example, #37.1 (between #s 37 and 38). Intended as a jumping on point, it might have worked better if any care had been made to ensure that #38 wasn't part four of a six-part story.
  • Like Zero Hour above, the miniseries Marvel: The Lost Generation has the numbering go backwards, matching the time-travelling POV character.
  • Back before it ended, the Deadpool Team Up series was numbered backwards, starting at 1000.
  • The Venom arc "The Circle of Four" got the numbers 13.1 through to 13.5, all during the same month.
  • During the late 90s, the Superman titles had "triangle numbers", indicating the order they should be read in to follow the ongoing story. When the "Millennium Giants" storyline (which ran from Superman: The Man of Steel #79, triangle number 15, to Superman Vol 2 #135, triangle number 20) crossed over into Aquaman, Challengers of the Unknown, Teen Titans and Steel, the crossover issues were given triangles reading 15.1, 15.2, 16.1 and 17.1.
  • Marvel's Original Sin tie-in minis were named like Original Sin X.Y, where Y is the normal issue number in the mini; nothing to see there, but X was generally not the issue they came after in the event, but instead the one they came after in the series they tied into. So for example Original Sin 5.1 didn't come after Original Sin 5, it came after Loki: Agent of Asgard 5.
  • There have been a number of series that have been rebooted to #1 to take advantage of the extra sales it generates. Then when the number of issues of the new volume and previous volume will add up to a multiple of 100, the old numbering will be restored to take advantage of the "anniversary"
  • DC Comics confused at least a few readers in 2016, when the DC Rebirth relaunch, a borderline-but-not-quite reboot meant to tweak elements of their New 52 continuity without abandoning the actual established stories and events, started up, for two reasons: 1.) select Long-Runners, namely Action Comics and Detective Comics, actually reverted back to the numbering system they had used before the previous reboot, meaning that for instance Detective Comics suddenly jumped up to number 930-something, and 2.) as part of their relaunch/launch of multiple titles, various books were announced as getting "new Number Ones" after they got what was referred to as their "Rebirth one-shots", which were single-issue books that were titled, say, Green Lanterns: Rebirth, Wonder Woman: Rebirth, etc., and were supposed to be jumping-on points for new readers to entice them into the following ongoing series. Except one must pity the poor reader who didn't realize that the "one-shots" inexplicably had an actual issue number in the upper right corner of the covers, which happened to be "1"... as did the following issue that would continue that book's story, since as noted, they were getting "new number ones in addition" to the Rebirth "one-shots". Additionally, some of the so-called "one-shots" weren't really standalone stories at all and were closely tied to the plots of one (or more) books involving their characters, leaving a reader slightly confused if they happen to skip the event's "one-shot" and try to jump straight to the "ongoing" story in one or more books. Which they might actually do, if they think it's another version of the "first issue" that just happens to have a Variant Cover (which DC had also made clear every issue would get, after all).


  • The Naked Gun series: the second film is numbered 2 1/2 and the third is numbered 33 1/3.
  • The Star Wars films: The first entry was retroactively numbered Episode IV. Followed by Episodes V, VI, I, II, III, and VII in that order.

  • In Gone, the chapters come with a countdown of days, hours, minutes, and seconds to the climax of the book.
  • In Logan's Run, the chapter numbers go down. Since it ends with a rocket taking off, it's a countdown.
  • Similarly, the section numbers in Everything Matters count down to the destruction of life on earth. And when the main character gets the chance to relive part of his life, and the numbers start over.
  • In Dan Abnett's Warhammer 40,000 novel Titanicus, the chapter numbers are in binary.
  • In Margaret Ball's Mathemagics, the chapter numbers are mathematical formulae that can be solved for the actual number. (She lists the solutions in the back.)
  • The Curious Incident of the Dog in the Night-time only has prime-numbered chapters, due to the narrator disliking other numbers.
  • Storm by George R. Stewart is chaptered "The First Day", "The Second Day", "The Third Day" and so on. There are no chapter numbers.
  • The Name of the Rose does the same thing, and subdivides the chapters according to the hours of the monastic day.
  • Wayside School Is Falling Down is stuck on the nineteenth story for three chapters. The following chapter is headed "20, 21 & 22: Eric, Eric and Eric".
    • The previous book, "Sideways Stories from Wayside School," has no Nineteenth chapter at all (since the school isn't supposed to have a nineteenth story, either.) Instead, between chapters 18 and 20 we get a notice saying "there is no nineteenth story. Sorry."
  • The Gods Themselves by Isaac Asimov starts with chapter 6 of its first section, before flashing back to chapters 1-5 (i.e. the story is told out of order but the chapters are numbered in strict chronological order).
    • It also breaks all the chapters (except for the last one) in the second section of the book into three parts, numbered 1a, 1b, 1c (all of the action in these chapters are taking place at roughly the same time), 2a, and so on; the letters correspond to three different viewpoint characters.
  • The three books in Robert Anton Wilson's Schrodinger's Cat Trilogy are all Book One, and the parts of each book are all Part One.
  • In the Alcatraz Series book four, due to its offbeat style, the book starts on chapter 2, then skips to chapter 6 (mentioning how boring chapters 3-5 were), then from there it proceeds to chapter pi, then 4 1/2, then 42. Eventually you read through Act V, scene III, Chapter No!, Chapter 24601 (a reference to Les Misérables), Chapter 8675309, Chapter Infinity, and chapter infinity plus one, along with many other crazy chapter titles.
    • The titular narrator explains that this is a security precaution against Evil Librarians. Since the Evil Librarians are obsessed with order and putting everything in its place (which is why they're trying to take over the world), their heads will explode if they try to make sense of his numbering scheme.
  • The Eye of Argon includes a Chapter 3 1/2 and a Chapter 7 1/2.
    Mike: This edition seems to have omitted Chapter Pi.
  • The Running Man also does a countdown. Appropriate, since the main character has to survive for a specific time to win a prize. Actually, it's the countdown to his suicidal destruction of Games HQ by airplane collision.
  • Life in the Fat Lane's chapters are numbered according to the weight of the protagonist.
  • The Ring of Ritornel counts up to chapter 12, then starts counting down again; each chapter in the second half has a title which is a variation on the previous chapter with the same number. The final chapter in numbered x.
  • How To Eat Fried Worms has a chapter-and-a-half, and one chapter literally has only a blob of ink for a chapter name and number. (It's sometimes referred to as "Chapter Splort" in readings.)
  • The chapters in Jurassic Park are titled "First Iteration", "Second Iteration", etc., in keeping with Ian Malcolm's interest in fractals. Actual fractals (iterations of the Heighway dragon curve) are shown on the chapter pages, but the count is wrong—the "First Iteration" actually has a picture of the third iteration, and so on. (This might be because the first and second iterations don't look very interesting.) In the sequel The Lost World (1995), it becomes "First Configuration", "Second Configuration" etc.
  • Going Postal, the first non-young-adult Discworld novel since The Colour of Magic to feature chapters, has a chapter 7A instead of a chapter 8 (because the number 8 is considered unlucky on the Discworld).
    • And while Thief of Time (as stated above) does not have chapters or chapter numbers, it does have a "tick" in the middle of each break in the text... at least until it doesn't
  • The chapters of I Am the Messenger are all playing cards, as each of its four acts begin with the main character receiving an Ace of each of the suits. And then it all goes out the window once he receives the Joker.
  • The Man Who Loved Only Numbers, a biography of Paul Erdos, starts with chapter 0, then goes up through one, two, e, three, pi and so on, before ending with an epilogue: Chapter Infinity.
  • Aside from the prologue, each chapter of A Night in the Lonesome October by Roger Zelazny is titled October 1, October 2, etc., all the way to October 31, as each chronicles the events of that day.
  • Zelazny's Roadmarks, which involves time travel, begins with "Two", followed by "One" — then another "Two", another "One", and so on through the book. The chapters numbered One follow the protagonist through the story; the chapters numbered Two contain related scenes in other times and places, and are not in chronological order.
  • In Roddy Doyle's book, The Giggler Treatment, there were a few flashback chapters. The narrator apparently lost track of what chapter he was on after those and began naming chapters things like, "The Chapter After That Last One", "Chapter Mammy Doyle" and "This Chapter Is Named After Elvis Presley Because He Lives Under The Shed In Our Back Garden."
    • Not forgetting "Chapter Something"!
    • One of the few chapters that doesn't follow this format, the sixteenth chapter, is actually called "Chapter Sixteen", possibly as a gag.
  • The Captive by Scott O'Dell uses Mayan numerals for chapter numbers.
  • In Survivor by Chuck Palahniuk, the chapter numbers count down, as do the page numbers.
  • The Doctor Who Expanded Universe novels are full of this. There has been at least one instance of numbers counting down. It almost always has something to do with Time Travel.
    • The Torchwood novel The Men Who Sold The World has six Chapter Nineteens, each (except the last one) ending with Mr Wynter activating the time-gun and travelling back to the start of Chapter Nineteen. It also has flashback chapters headed "X Years/Months/Weeks Earlier..." and a prologue and epilogue headed "100,000 BC"
  • In John Varley's time travel novel Mammoth, the chapters are numbered in absolute chronological order, which is not the order the story is told in.
  • Iain M. Banks's Use of Weapons has two interleaved streams of chapters, one conventionally numbered in sequential Arabic figures for the main story set in the Present, and one counting backwards in Roman numerals working through the protagonist's backstory.
  • Tik Tok has twenty-six chapters, which don't have numbers, but each one begins with the appropriate letter of the alphabet in a very large font. (So chapter one begins "As I look..", chapter two begins "Broaching the second chapter..." and so on. The writer has to cheat a little: for example, chapter four has "Hey Dummy!" and chapter seventeen has "Q. Cue the bloody rainbow...")
  • Family Bites by Lisa Williams has "Chapter Twenty-Four - Part One" and "Chapter Twenty-Four - Part Two".
  • Imzadi, a Star Trek: The Next Generation novel by Peter David, doesn't have chapter numbers, but it has section titles such as "The End", "The Beginning of the End", "Interlude", and "The End of the Beginning". Though thematically appropriate for the sections, and entirely understandable for a time travel novel, they have nothing to do with their locations in the book.
  • Serpents Among the Ruins, a Star Trek: The Lost Era novel by David R. George III, has its chapters numbered from "Minus Ten" to "Plus One" (plus an Epilogue, for good measure). Chapter "Zero" is the main event of the plot.
  • In the Greek version of The Bible, the Septuagint, the Book of Esther has additions not found in the Hebrew versions. They were numbered to come after the rest of the book, but later re-inserted into more appropriate places. Consequently, the chapter numbers are out of order, and the book actually begins with Chapter 11.
  • Alain Damasio's La Horde du contre-vent has reverse numbered pages. It can be startling if you only notice it halfway through the book.
  • Georges Perec's La disparition (translated into English as A Void) is a lipogram - the letter E never appears in the text. It's 26 chapters long, but chapter 5 is missing.
  • Atlanta Nights has two chapters called Chapter 12 and no chapter 21. There's no real reason behind it, other than adding to the overall lack of professionalism in the book.
  • The Thursday Next books begin every chapter on a right-hand page. If the previous chapter ends on a right-hand page, the intervening left-hand page is blank. There is no Chapter 13, although one is listed in the contents — with the page number of the blank page before Chapter 14.
  • The book The Dancing Wu Li Masters (Think Zen and the Art of Motorcycle Maintenance) numbered each chapter "Chapter One," with a different title under each one. The philosophy behind this is eventually explained in the book.
  • Looking for Alaska is separated into two sections, Before and After. Each section is divided into days (like 10 days before or 75 days after), with Before counting up to Alaska's death and After wrapping everything up.
  • A few Captain Underpants books have chapters numbered X 1/2, and one even has one with a 3/4.
  • The Otto Undercover series by Rhea Perlman does this a lot. For example, in the first book, the table of contents lists "Chapter Minus 1", "Chapter 0", "Chapter Regular 1", "Too Many Chapters", and "The End". The actual names of the chapters in the book are "Chapter Minus 1", "Chapter 0", "Chapter Regular 1", "Chapter 2", "Chapter 2½", "Chapter 3", "Chapter 4", "Rude Interruption of the Story, Number One", "Chapter 4 Again", "Rude Interruption of the Story, Number Two", and so on...
  • The Spanish novel La tournée de Dios, much like the example of The Gods Themselves, has the story told out of order but the chapters numbered in strict chronological order. The author lampshades this in the prologue proposing options to the reader including cutting all pages then putting them in order or directly throwing the book out of the window without reading it (although he doesn't believe the last option to be the best)
  • Brazilian novel A Lua Vem da Ásia has: "Chapter First" - "Chapter 18th" - "Chapter Twelve" - "(No chapter)" - "Chapter without Sex" - "Chapter 99" - "Chapter Twenty" - "Chapter I (again)" - "Chapter " - "Chapter CLXXXIV".
  • In William Alexander's Goblin Secrets, the chapters are listed as Act and Scene numbers, like a play's.
  • In RJ Anderson's Ultraviolet, it starts with zero, and ends with infinity, and includes not only the number but a parenthetical comment about how the number appears to the synesthete heroine.
  • If You're Reading This, it's Too Late from the Secret Series has the chapters in reverse order (starting with Chapter 34 and ending with Chapter 1) because the author hopes the book (and the secrets contained within) will explode like the countdown timer on a bomb. In This Isn't What It Looks Like there are normal chapters, but also negative chapters for the main protagonist, Cass, and what she's doing in the past.
  • In Shiver the chapters come with the current temperature of area.
  • Jacek Dukaj's novel Inne pieśni, set in a world where Greek culture is dominant, has its chapters numbered with consecutive Greek letters.

    Live Action TV 
  • Mystery Science Theater 3000 began as a local TV show (on Minneapolis station KTMA), then became a 10-year national series on The Comedy Channel (later Comedy Central) and then the Sci-Fi Channel. Since all of its cable-era marketing treated the first national season as Season 1, fans and show archivists retroactively "numbered" the KTMA episodes "K01" through "K21", with an unaired pilot-show fragment numbered "K00". Confusingly, IMDb originally called the KTMA shows "Season 0", but has now renumbered them all to Seasons 1-11, breaking with all other information sources (but oddly keeping the "0" number for the "pilot").
  • QI labels its seasons not with numbers but with letters, with series 1 being called "Series A", series 2 being "Series B" and so on.

  • Professor Peter Schickele (University of Southern North Dakota at Hoople) is the world expert on the music of P.D.Q. Bach - the last and certainly least of Johann Sebastian Bach's sons. He has assigned Schickele numbers (S) to PDQ Bach's works.
    • The 1712 Overture is S. 1712.
    • The Classical Rap is S. 1-2-3
    • Einstein on the Fritz is S. e=mc2
    • The Erotica Variations is S. 36EEE
    • Hansel and Gretel and Ted and Alice (an opera in one un-natural act) is S.2n-1 (odd!)
    • The 'Howdy' Symphony is S. 6 7/8
  • Stan Freberg's "Wun'erful, Wun'erful!" originally spanned two sides of a 45 RPM record, labeled "Side Uh-One" and "Side Uh-Two."
  • The Karn Evil 9 Suite was originally four tracks — called First Impression (Part One) (which ended Side 1 of the album), First Impression (Part Two), Second Impression, and Third Impression. At least one compilation album has featured a track which was supposed to be Second Impression but was actually First Impression (Part Two).

    Tabletop Games 
  • The original Malkavian clanbook in Vampire: The Masquerade. So much so it calls the Appendixes "Liver One" and "Kidney Two".
  • The Normality game master's guide, which only manages to be a little less weird and disturbing than the other book. And that's very, very weird and disturbing. Part Juan, Past Dues, Parrot Tree, Parched Fief, Park Sex.

    Video Games 
  • Braid began with World 2 and works it way to World 6, with World 1 being the last world you visit. It could be symbolic of the fact that in the final level, time flows backwards.
    • Similarly, the stages in World 1 count down from 4 to 1, probably for the same reason.
  • The stages in Radiant Silvergun are numbered not by the order the player goes through them, but by the time period they take place. Because of this, the final stage, which is set millions of years in the past, is Stage 1.
  • The story of The World Ends with You is played by week. During the first week, each day starts with a "THE XTH DAY" screen and ends with a "CHAPTER TITLE" screen. The second week starts over, so your eighth day is again "THE 1ST DAY", ninth is "THE 2ND DAY" and so on. The first day of the third week, however, is "7 DAYS LEFT", Week 3 Day 2 is "6 DAYS LEFT", and Day 7 is "THE LAST DAY". The unlockable bonus chapter is "ANOTHER DAY".
  • The version of Free Cell that comes with Windows has either 32,000 (pre-XP) or one million games, which are given positive numbers starting from 1. However, there are also secret deals -1 and -2, which are impossible. Vista added deals -3 and -4, which are quite the opposite.
  • Minecraft Alpha and Beta releases had version numbers in the format of 1._____, eventually culminating in 1.9 prerelease 5. The "final" version of Minecraft is simply numbered version 1.0.0.
  • The arcade game Kamen Rider Battle Ganbaride used straight numbers for its first several sets. When Kamen Rider OOO premiered, the sets were relaunched with set 001, when Kamen Rider Fourze premiered it was relaunched again with set 01, and Kamen Rider Wizard led to sets starting with "Shabadoobie". The same thing happens with Super Sentai Battle Dice O, where the early sets just had numbers, the Kaizoku Sentai Gokaiger sets used "DX-{number)", the Tokumei Sentai Go-Busters sets used "Tokumei-(number)", and the Zyuden Sentai Kyoryuger sets use "Gaburincho-(number)" (or "GB-(number)" for short).
  • Touhou uses decimals for in-between installments. 7.5, 10.5, 12.3, 13.5, and 14.5 were fighting games, 9.5 and 12.5 were unique photographing games, 12.8 was a Lower-Deck Episode with Cirno as the main character, and 14.3 was a sequel to 14 with Seija Kijin as the main character. (Yes, there were 3 games between 12 and 13. No, they aren't examples of Capcom Sequel Stagnation.)
  • Marathon has Marathon, Marathon 2: Durandal, and Marathon Infinity note . As a continuation of this, the updated fan-supported source port version is called "Aleph One" - infinity plus one.
  • Newer 2D Super Mario Bros. games as well as Super Mario 3D Land/World use symbols as numbers for special/final levels, such as World 2-🏰 or World 5-🚂 (and sometimes more abstract ones like 🍄, ⭐ or 👑). Sometimes entire worlds are numbered like this, which may lead to Department of Redundancy Departments such as World 🏰-🏰.
  • In Evil Zone, the Japanese chapter titles for most characters' stories are conventionally enumerated in kanji, though some of them replace the 話 (chapter) counter with another kanji: Setsuna's story uses 幕 (act) and Tenpouin's story uses 夜 (night). Midori's story uses "Round 1," "Round 2," etc.; Erika's uses "Episode 1" through "Episode 10"; and the Gratuitous English-loving Gally gets "1st Stage," "2nd Stage," and so on in romaji.

  • Adventurers! had hundreds of strips numbered 999 during the final boss battle arc, as a joke on Caps in RPGs.
  • The two prequel books for The Order of the Stick are numbered volume 0 and volume -1.
  • Homestuck
    • It was originally intended to have 7 acts. As time went on, however, more plot threads and characters were introduced, requiring more acts. Hence, we have, in order, Act 1, Act 2, Act 3, Intermission 1, Act 4, Act 5 Act 1, Act 5 Act 2, Intermission 2, Act 6 Act 1, Act 6 Intermission 1, Act 6 Act 2, Act 6 Intermission 2, Act 6 Act 3, Act 6 Intermission 3, Act 6 Act 4, Act 6 Intermission 4, Act 6 Act 5 Act 1, Act 6 Act 5 Act 2, Act 6 Intermission 5 (including its own Intermissions 1 to 6 and an "Interfishin'"), Act 6 Act 6 Act 1, Act 6 Act 6 Intermission 1, Act 6 Act 6 Act 2, Act 6 Act 6 Intermission 2, Act 6 Act 6 Act 3, Act 6 Act 6 Intermission 3, Act 6 Act 6 Act 4, Act 6 Act 6 Intermission 4, Act 6 Act 6 Act 5, Act 6 Act 6 Intermission 5, Act 6 Act 6 Act 6, and finally Act 7.
    • It went BACKWARDS from Act 6 Act 5 Act 2 to Act 6 Act 5 Act 1.
      Caliborn: GO BACK.
      Hussie: No.
      Caliborn: I MEAN BACKFORWARD.
      Hussie: No.
      Hussie: No.
    • It is lampshaded by Caliborn once more:
    • As well as that, the acts are badly proportioned, as can be seen on this site.
  • Decrypting Rita's chapters start out normal at first but soon become Roman numerals before jumping around. Two are even repeated because their earlier instances have been corrupted, thus obscuring some of the more surprising plot developments in the story. It finally ends on Chapter Aleph, as in the cardinality of infinite sets.

    Web Original 
  • "A Beginner's Guide To The British" has Part One, Part Two, Part Four three (oops), Part Four, and Part Four five.
  • The Nostalgia Critic, in his Top 11 Mind*** Countdown, used entries such as "Number Guttenburg" "Number Lamp" and "Number Number" (depicted by a # sign).
  • The Book of Sand puzzle does this with PAGE numbers. The page numbers are 999, 1001, 40514, 82499, 71077345, 3141592654, 11111000101, and 23^9. Worse yet, they don't take place in order. Rather, the reader has to put them in order based on context of the story.

    Western Animation 
  • From the third season of ReBoot on, where the show kicked off a full Myth Arc, episodes were numbered like versions of software in the formula vX.Y.Z where X is the season, Y is which Story Arc of the season, and Z is which episode of the Story Arc.

     Non Fiction  
  • One should not be surprised to open up a programming language reference book and see that the chapter numbers start at zero. If the author of the book has done this, the language will almost certainly use zero as the index of the first item in an array. Probably the languages to get this treatment the most are C and C++.
    • Some math books also do this.
    • John Conway's On Numbers and Games not only starts at chapter zero, it's also divided into a "zeroth part" and a "first part."
  • The INTERCAL reference manual has a tonsil instead of an appendix.
    "Since all other reference manuals have Appendices, it was decided that the INTERCAL manual should contain some other type of removable organ."
  • Similarly, one strategy guide for the computer game Monty Python's Complete Waste of Time includes spleens instead of appendices, and they're scattered throughout the book rather than all placed at the end. Most of these are just quotes from various Monty Python sketches that are vaguely relevant to that part of the game.
  • Donald Knuth has a tendency to give his software idiosyncratic version numbers. The release versions of his font-design program METAFONT are 2, 2.7, 2.71, 2.718, etc, asymptotically leading to the constant "e"; similarly, the release versions of his typesetting program TeX are 3, 3.1, 3.14, and so on, converging to "pi".
    • It's been claimed (possibly by Knuth himself) that when he dies the version numbers will be changed to e and pi respectively, and any further bugs will thereby be considered features.

Alternative Title(s): Idiosyncratic Episode Numbering