Milestone Celebration

This was meant to be the 100th update.
Valve Time happened.

"I will not celebrate meaningless milestones."
Bart's chalkboard gag, The Simpsons, "Sweet Seymour Skinner's Baadasssss Song" (100th episode)

Show pilots are a very tricky process. They are made, and even if they get a chance on the air, the vast majority of them fail within a few weeks. With other shows, they sometimes will build up a dedicated audience that will fail to keep the show alive long enough. Most of the time.

Most full television seasons are between 20 and 26 episodes long. There are various exceptions, animated shows can go from 13 episodes to well over 40 episodes. With such a vicious market, the ability to reach the 100 episode mark is a rare and coveted thing. So when a show does achieve that milestone, they plan something big to not only draw ratings, but to break out into the three digit episodes.

This will often coincide with the Very Special Episode, but it could also be the Tonight Someone Dies or other similar episodes. It may avoid all of that and the episode is just given an additional polishing to make it one of the best episodes of the series. It may also result in an Internal Homage, when elements (or even the entire plot) of the series' first installment is directly homaged in celebration of the event.

In the case of Long Runners and shows where a hundred episodes is not that big of a deal, the celebration is sometimes in the form of "10 Year Anniversary" or something similar.

Part of the celebration is that pure money is offered with syndication rights, which a general rule of thumb is to have 100 episodes to air in certain time slots like Nick at Nite does. Because the show was already financed and produced, this will bring in the nostalgic viewers without much effort.

But no matter what, remaining in the public view for five years is an impressive event in any form of media.

Remember, Examples Are Not Recent.


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  • Inuyasha did a special retrospective type episode for its 100th. All the characters got stuck in demon moth cocoons and thinking about how InuYasha always helped them out while InuYasha was trying to rescue them.
  • Sailor Moon ended with episode 200.
    • A Continuity Reboot anime, Sailor Moon Crystal, was announced on the franchise's 20th year of existence. Some of The Merch for Crystal also bears the 20th anniversary celebration logo, despite being released two years later.
  • Pokémon:
  • Diebuster was made to commemorate Studio Gainax's 20th anniversary.
  • The Naruto manga celebrated its ninth anniversary with a page showing Gaara and Naruto posing with a certain group of seven other people.
    • They did this yet again for its tenth anniversary in chapter 434 with a cover of Naruto clones working on a puppet of his newly-acquired Sage-Mage enhanced Rasenshuriken technique.:[1]
    • The anime had an omake for the 349th episode about the characters celebrating the 350th episode...which the title character himself wasn't invited to because he was not in it (the whole episode was about Sasuke and Itachi), and then noting that before this he was absent for the 100th episode (which was about Might Guy, Rock Lee, and Tsunade) and the 300th (the episode of the fight against Hidan and Kakuzu right before he showed up). Which is funny, because most of the characters who were invited there weren't in that episode either.
  • To celebrate Shonen Jump's 40th anniversary, there was a special anime tour moving through ten cities in Japan, showing anime movies that had been made just for the occasion. This included a new Dragon Ball special, which concluded its anime run (in Japan anyway) eleven years ago, making it a bit of a milestone celebration for Dragonball as well.
  • The Gundam franchise has had several over the course of its long life:
  • Macross Frontier was originally planned as a 25th anniversary for Super Dimension Fortress Macross. It ended up a year late, but the show was still full of references to the number 25: the new fighter was the VF-25, Frontier was the 25th fleet, the main Macross ship was the Macross Quarter (25%), etc. The show also related to elements of all the previous Macross series.
  • The Yu-Gi-Oh! Tenth Anniversary Movie marks the ten years of the Yu-Gi-Oh! anime series (not including the Toei series), featuring the main protagonists of the original, GX, and 5Ds series teaming up.
  • Yu-Gi-Oh! The Dark Side of Dimensions will commemorate the franchise's 20th anniversary.
  • One Piece Film: Strong World, the 10th movie corresponding to the series' 10th year anniversary, was penned by Eiichiro Oda himself; as confirmed by Word of God, this means that this is part of the manga's canon. However, this is largely averted in the One Piece anime itself. No milestones in the series are particularly heralded as special events, and significant events only happen on episodes 250 (end of Franky's origin flashback), 300 (Zoro's defeat of CP9's Kaku) and 400 (Silvers Rayleigh talking about Gold Roger).
  • For Azumanga Daioh's tenth anniversary, the manga was re-released with updated artwork and new chapters.
  • The Slayers franchise celebrated its 20th anniversary with re-releases: both new cover art and slight changes in dialogue for the light novels and new boxart complete with new supplementary materials for the anime.
    • Earlier in 2006, for its 15th anniversary, Megumi Hayashibara released a new single, Meet Again, and it was accompanied with a new animated music video of the characters, making it the first animated feature for the franchise since the Slayers Premium movie in 2001.
  • For the 30th anniversary (2008) of both Rumiko Takahashi's first published short story (Katte na Yatsura) and the manga version of Urusei Yatsura, three new OVA episodes (one for each of Urusei Yatsura, Ranma ½, and InuYasha) were made, along with an animated short crossover of those three series. (The Inu Yasha OVA episode, which covered the Black Tessaiga arc, was later reused as part of the second TV series.) These were initially shown during that year at a gallery show, called "It's a Rumic World", which also featured manga manuscript pages and other illustrators' drawings of Takahashi's characters on display.
  • Pretty Cure actually had two 5th anniversary celebrations, both beginning the Pretty Cure All Stars film series. The first was the short Go Go Dream Live, which had the first team up between the Futari wa Pretty Cure Max Heart, Futari Wa Pretty Cure Splash Star and Yes! Pretty Cure 5 Go Go teams. The full movie Pretty Cure All Stars DX is a big screen revamp of that short, including the Fresh Pretty Cure! team. Pretty Cure All Stars DX 3 celebrated 10 Pretty Cure movies (quite the feat for a magical girl series). Happiness Charge Pretty Cure marked exactly 10 years to the beginning of the original series Futari wa Pretty Cure with a Couch Gag where a Cure from the past would introduce the show. This season also celebrated 500 episodes of the franchise.
  • Dragon Ball Kai was released in Japan in 2009 to celebrate the 20th Anniversary of Dragon Ball Z. Five years later in 2014, after the series had previously been cancelled in 2011 with one arc left to be redone, it was brought back to do the final arc, just in time for its 25th Anniversary. That same year, Americans got to join in on the celebration: not only was it announced that Kai would now be airing uncut on Toonami, but Funimation announced that they were giving the Battle of Gods film an English dub and giving it a limited run in theaters.
  • Digimon had a sequel series to Digimon Adventure announced on August 1, 2014, 15 years to the day the seven main characters were brought to the Digital World.
  • On April 10, 2014, for the tenth anniversary of A Certain Magical Index and his debut as a writer, Kazuma Kamachi made ten announcements about his various works, including a Massive Multiplayer Crossover between his novels.
  • For the 40th anniversary of the Time Bokan franchise, Tatsunoko Production released Yatterman Night, a Continuity Reboot of the franchise's second series. Karas was made for the 40th anniversary of the studio itself.
  • Aquarion Logos was made to celebrate the series' 10th anniversary.

    Comic Books 
  • In Spawn #100, Malebogia, the Big Bad of the first 99 issues, is killed off. Spawn's nemesis/occasional ally, Angela, is also killed.
  • Sonic the Comic celebrated its 100th issue (and, by extension, 200th week in existence) by ending the Robotnik Rules arc, which had been going on since issue 9. Some argue it Jumped the Shark then. Sonic the Comic – Online! 261 issue celebrated the 20 years anniversary of Sonic the Comic.
  • Archie Comics' Sonic the Hedgehog:
    • Other Sonic anniversary issues:
      • Issue #25: Sonic CD adaptation
      • Issue #50: Conclusion of the "End Game" story arc, where Dr. Robotnik is Killed Off for Real.
      • Issue #75: Following the development from #50, an alternate-universe Robotnik resembling the games' "Eggman" version is instated as the new Big Bad.
      • Issue #100: Freedom Fighter reunion
      • Issue #125: Sonic is apparently killed
      • Issue #150: Evil Sonic mucking things around
      • Issue #175: Eggman destroys Knothole and completely defeats Sonic.
      • Issue #200: Sonic foils another one of Eggman's schemes which causes him to go through a massive Villainous Breakdown that he completely loses what left of his sanity and put out of commission. Leaving the way for Snively to take over and kickstart the Iron Dominion arc.
      • Issue #225: Sally is apparently killed and kicks off the Sonic: Genesis storyline
      • Issue #250: The beginning of the third and final act of the Crisis Crossover Sonic the Hedgehog/Mega Man: Worlds Collide, setting up the massive Cosmic Retcon that would befall the "Prime" Zone after the crossover ended. Ironically, the narrative of the issue as a standalone would be more befitting a Mega Man milestone than a Sonic one, as the bulk of it is a Big Badass Battle Sequence against nearly every Robot Master to have ever existed.. Originally, it was supposed to have been the conclusion of the Mecha Sally storyline.
      • Issue #275 is the second to last issue of the Sonic The Hedgehog Mega Man Worlds Unite storyline.
    • Sonic Universe was supposed to celebrate its 50th issue with a tale set outside of the Archie continuity: an epilogue story for Sonic Underground. (The story will still occur, albeit later.)
      • Sonic Universe #25 kicked off Silver's storyline.
      • #75 is another Metal Sonic-based story.
    • Knuckles The Echidna #25 had Knuckles be fully reunited with his father Locke.
  • Both of Mega Man's milestone issues involved the Worlds Collide and Worlds Unite storylines.
  • Cerebus the Aardvark ended with issue #300. This event had been planned for 27 years. The previous centennial issues each featured major turning points in his life: issue 100 introduced Cirin, the Big Bad of the series, and revealed that she was an Aardvark like Cerebus. Issue 200 has Cerebus meet his creator in space, and upon his return he gives up on adventuring and settles into the life of a barfly.
  • Legion of Super-Heroes had a #300 in 1983 which was the 25th anniversary, which put to rest the AdultLegion story and brought back artists (and even logos) from various eras of the Legion. Natural for a comic published every month for 25 years—except it wasn't. The Legion had moved between comics and ended up getting the numbering of the Superboy comic, which wasn't monthly throughout its run; the fact that issue #300 was the 25th anniversary was pure coincidence.
    • Also, the 10th anniversary (Superboy #147, 1968) finally revealed the origin of the Legion. The 30th anniversary (volume 3, #45, 1988) brought back the older artists again. The Legion has also done standard anniversary issues according to the cover numbering, meaning that V3 #50 was an anniversary issue with a letter column commenting on another anniversary issue.
  • Amazing Spider-Man #50 was the famous "Spider-Man No More!" story where Peter quits being Spider-Man (duh), but finds himself unable to quit as the Kingpin (the future Daredevil Rogues-Gallery Transplant) rises to power.
    • Issue 100: Peter tries to remove his powers, has an acid-trip dream where he fights the Vulture, the Lizard, the Kingpin, Doctor Octopus, and the Green Goblin before seeing an image of the deceased George Stacy. When he wakes up, Spidey discovers he has six arms, kicking off the Six-Arm Saga that introduced Morbius.
    • Issue 200: Spider-Man faced Uncle Ben's killer, the Burglar (who was now working with Mysterio) once more.
    • Issue 300: First full appearance of Venom.
    • Issue 365: Celebrated the 30th anniversary of the web-spinner with a story that had Spider-Man fighting the Lizard again, the re-introduction of Peter's parents (who would later be proven to be androids), a sick poster of Spidey, Venom, and Carnage, and a preview of Spider-Man 2099.
    • Issue 400: Ended with the death of Aunt May and the revelation that she'd known Peter was Spider-Man for years. Most of the fandom agreed it was a fitting sendoff for the character. Naturally, this was retconned a little over a year later...
    • Issue 500: Spidey helps Doctor Strange and several other heroes deal with a demon invasion in New York, magically revisits several moments in his past, and gets to meet Uncle Ben's ghost for five minutes thanks to Strange.
    • Issue 600: An upgraded Doctor Octopus attempts to make up for his past misdeeds by taking electronic control of New York City, the idea being that he can make everything far more efficient. Unfortunately, his subconscious mind attacks Spider-Man, endangering everyone around him, and tries to ruin the arrangements for Aunt May's wedding to J. Jonah Jameson Senior. Spidey beats Doc Ock at the site of their very first battle, and May and JJJ Sr are married by Jonah himself. Oh, and Mary-Jane shows up to catch the bouquet.
    • For Spidey's 50th anniversary in 2012, Marvel did:
      • The first-ever crossover between the Marvel Universe and the Ultimate Marvel universe; as Peter Parker faces a world where he was killed in action and Miles Morales (the new Ultimate Spidey) sees what his predecessor might have grown up to be.
      • A separate storyline where Spider-Man took on a Kid Sidekick which ended badly; the kid quickly became a Smug Super and Spidey had to depower him before he became even worse.
      • Issue 700: Amazing Spider-Man's final issue leading into its Marvel NOW replacement Superior Spider-Man; the conclusion of a long-running subplot where Doctor Octopus was dying from injuries accumulated from his many fights with Spider-Man - but not before pulling a "Freaky Friday" Flip on Peter and wearing mind-swap-protection armor to secure his position; unable to regain his true body, Peter implants his memories into Doc Ock and convinces him to not ruin the reputation of Spider-Man as Doc Ock's former body passes away, taking Peter's mind down with it. This turns the villain into the Superior Spider-Man.
  • Don Rosa has done quite a few of these for various characters in the Disney Ducks Comic Universe:
    • For the 60th anniversary of Donald Duck's creation, he wrote "The Duck That Never Was", an It's a Wonderful Plot story set on Donald's birthday.
    • He also did "W.H.A.D.A.L.O.T.T.A.J.A.R.G.O.N", a story for the 60th anniversary of Huey, Dewey, and Louie's first appearance that was a Whole Episode Flashback to the day the nephews joined the Junior Woodchucks.
    • For Scrooge McDuck's 50th anniversary, Rosa wrote a story "A Little Something Special", where Scrooge's biggest enemies plot to rob him during a celebration of the anniversary of the day Scrooge arrived in Duckburg. It took ten years for the story to be published in Brazil and it served not only to celebrate Scrooge's 60th anniversary but also to celebrate issue 500 of his Brazilian comic book line.
    • Even Gyro Gearloose got a 50th anniversary special, "Gyro's First Invention", which featured a Whole Episode Flashback that explained where his little robot Helper came from, and explained how he helped Scrooge get the money in his money bin out of the sinkhole it fell into after the events of Carl Barks' "A Christmas for Shacktown".
    • Furthermore, there is Gladstone Gander's 50th anniversary special, "The Sign of the Triple Distelfink", wherein he tries to avoid his own birthday party, in order to hide the fact that his birthday is the one day of the year when his legendary luck leaves him. A flashback in this story reveals he was literally Born Lucky, having inherited his good luck from his mother.
  • Most Archie Comics digests will have special stories for their Milestones, where the characters discuss exactly how they should celebrate said milestone.
    • Archie Double Digest #200 celebrated 200 issues with the start of a 4 part "New Look" story entitled Archie Goodbye Forever, and even bigger than that, Archie #600 celebrated 600 issues with the start of a 6 part story entitled Archie Marries Veronica (of which the final three parts switched to Archie Marries Betty).
  • In 1985, DC Comics celebrated their 50th anniversary with Crisis on Infinite Earths, which brought a Cosmic Continuity Reboot upon the DC Universe.
  • In the DC Universe, several Post-Crisis titles hit #100 at about the same time in The '90s. All of them were given special prismatic covers. In addition:
    • Superman launched "The Death of Clark Kent" arc, in which Superman temporarily gave up his secret identity.
    • Wonder Woman had the death of Diana's Anti-Hero Substitute, Artemis, leading to the restoration of the status quo.
    • Justice League America gave honorary membership to the entire DC Universe, and then had a big fight against Lord Havok (revealed to the reader, but not the team, to be Maxwell Lord). And then Guy Gardner showed up, kicking off the "Way of the Warrior" Cross Over between JLA, Guy's own title and Hawkman.
    • Green Arrow had the title character killed and replaced by his son. (He got better, but not for a decade).
    • The Flash discovered the Speed Force, the source of all super-speedsters' powers which continues to affect the series to this day. He then used it to give himself a serious power upgrade and save his city from the brink of annihilation.
    • In Green Lantern (Vol. 3) #100, then-current Green Lantern Kyle Rayner teams up with a time-displaced Hal Jordan, prior to his Face-Heel Turn as Parallax. It's also the prelude to the "Emerald Knights" story arc.
  • Marvel Comics:
    • In July 1986, they celebrated their 25th anniversary (the 25th anniversary of the Fantastic Four, their flagship Silver Age title) with a cover theme - every comic published in that month had a portrait of a character on it surrounded by a border containing various characters. Even the licensed comics got in on the act.
    • In 2009 when Marvel celebrated their 70th Anniversary note , many comics were published with Variant Covers with a style very similar to the 25th Anniversary listed above.
    • In 2014, they celebrated their 75th releasing five comics set in the year 2061, which is when they will celebrate 100 years of Marvel.
  • The Dandy and The Beano celebrated their 60th birthdays and 1997 and 1998 respectively. Both put out double-length issues in which The Dandy resurrected numerous older strips, while The Beano printed a series of stories based around the number 60.
    • Both also hit issue 3000 around the year 2000. The Beano's honouring of this was nothing special, but The Dandy featured a series of stories based around trouble caused by the '3000 bug', a spoof of the then-recent millennium bug scare.
  • Two Thousand AD has done a few:
    • For the 10th anniversary, a badge reading '10 years of Thrills' was inserted somewhere in each strip.
    • For the 30th anniversary, which was also the 30th anniversary of the first Judge Dredd strip, they began the "Origins" story, which explains how the world of Judge Dredd came to be. John Wagner had been planning on writing that story for a while, but figured that the 30th anniversary was the right time to publish it.
    • The 10th anniversary of 2000 AD's sister title, Judge Dredd Megazine, ran Judge Death's Origin Story.
    • In 2010, the Meg's 300th issue and 20th anniversary occurred within two issues of each other, and so issues 300, 301, and 302 were all double-length (and the price was raised by a pound; issue 303 was still 50p more than 299, grumble grumble). Across all three were run two special features:a three-part in-depth interview with Carlos Ezquerra, and past writers and artists reminiscing about their favourite parts of the Meg. Issue 302's Judge Dredd strip was full of all sorts of continuity nods and the final panel, while making perfect sense in the context of the story, was clearly a happy birthday message to the Meg.
  • For its 80th anniversary, Dick Tracy ran a storyline from September 18 to October 23, 2011, which doubles as a follow up on a 1948 story arc and an update of the first storyline (as recounted by Sam Catchem to Lizz Worthington).
  • The 70th Anniversary of Captain America, in addition to being right around the time the movie was released, featured Steve Rogers once again donning the identity after previously leaving his former sidekick James Buchanan Barnes to fill in the role. Marvel also released multiple variant covers to comics released in July which featured everyday Americans and real American heroes alike all bearing Cap's signature red-white-and-blue colors.
  • Superman returned to his trademark look and had his classic powers restored after the controversial energy being storyline for his 60th anniversary in the one-shot "Superman Forever."
  • The final part of The Death of Superman fell on Superman #75. The issue that kicked off his return? The Adventures of Superman #500. The issue that brought him back to Metropolis? Superman: The Man of Steel #25.
  • Batman Eternal is a year-long weekly series taking place as part of Batman's 75th anniversary.
  • Issue #50 of The Powerpuff Girls (DC run) featured a story originally intended as a season five episode of the TV show. The episode went over budget and faced a tight deadline, so the storyline was given to DC to make as a comic.

  • As a Long Runner, Doctor Who and its Doctor Who Expanded Universe have a plethora of anniversary stories. Uniquely, since the show was largely off the air during the anniversary periods of 1993 to 2003, it was up to the expanded universe to pick up the slack during those years.
    • 10th anniversary (1973): "The Three Doctors", a Reunion Show that concludes the Doctor's exile on Earth since 1970. Interestingly, it didn't mark the actual date of the anniversary, being aired almost a year beforehand; instead, it marked the beginning of the show's tenth season.
    • Averted with "The Stones of Blood", which was the 100th story and aired on the show's 15th anniversary (1978). It was going to start with the Doctor and Romana celebrating his birthday with a cake, but the production team wisely vetoed it as too self-congratulatory. The staff did eat a cake during production of the serial, though.
    • 20th anniversary (1983): "The Five Doctors", another Reunion Show. Unlike the other two canon TV anniversary reunion episodes, this one didn't mark a major status quo change for the Doctor.
    • 25th anniversary (1988): "Remembrance of the Daleks", which had the Doctor revisiting the site of the first episode the next day (albeit hundreds of years later in his own timeline), and "Silver Nemesis", which was about a 25th anniversary, aired over the anniversary date, and had a cameo of Nicholas Courtney and some program staff.
    • 30th anniversary (1993):
    • The fiftieth Doctor Who New Adventures novel is Happy Endings (1996) by Paul Cornell, in which a new logo is introduced, Benny gets married, a whole host of characters from previous novels are invited, a lot of dangling plot threads get resolved, and nearly every NA writer contributes a paragraph to the reception.
    • Doctor Who Magazine marked its 250th issue (1997) with the comic "A Life of Matter and Death", bringing back many of its characters in a battle inside the TARDIS' mind.
    • 35th anniversary (1998):
      • Novels: The Past Doctor Adventures (sort of) novel The Infinity Doctors, which features an unspecified Doctor and is filled with continuity nods.
      • Doctor Who Magazine comics: "Happy Deathday", which pits the then-Eight Doctors against a Legion of Doom of their greatest enemies. The story turns out to be actually a video game the Doctor's companion Izzy has been playing on her spare time.
    • Doctor Who Magazine celebrated its 20th anniversary (issue 283, 1999) with "TV Action!", a metafictional comic strip where the Eighth Doctor and Izzy chase Beep the Meep to October 12, 1979note  in a parallel universe where Doctor Who is just a TV show; there, they team up with none other than Tom Bakernote .
    • 40th anniversary (2003):
      • TV: The revival of the series was announced in that period.
      • Big Finish Doctor Who: The main event was "Zagreus" (also the 50th Big Finish audio), a Wham Episode that concludes the Anti-Time Story Arc which began back at the Eighth Doctor's audio beginning, sets the stage for the Divergent Universe story arc and casts a number of previous Doctor and companion actors in completely new roles. There was also the thematic Villains Trilogy of "Omega", "Davros" and "Master", which explores just how Not So Different the Doctor is from his recurring enemies, and a web-animation of the unfinished Fourth Doctor story "Shada", substituting the Fourth Doctor for the Eighthnote . The "Doctor Who Unbound" series of What If? stories also began that year.
      • Doctor Who Magazine comics: "The Land of Happy Endings", which revisits the settings and characters of the TV Comic strips via All Just a Dream.
      • Novels: The Past Doctor Adventures novel Deadly Reunion, penned by Third Doctor era architects Barry Letts and Terrance Dicks. The first half of it tells the early years of the Brigadier before meeting the Doctor.
      • Other: The animated webcast Scream of the Shalka, which was intended to be the official revival of the series. The above announcement reduced it to an non-canon Alternate Universe tale.
    • 45th anniversary (2008): The show itself (which was revived by then) did nothing explicitly celebratory, but that didn't stop the Expanded Universe any.
      • Big Finish Doctor Who: "Forty-Five", a Seventh Doctor audio anthology where the number 45 is littered everywhere. There is an in-universe rationale in the last story for that.
      • IDW comics: "The Forgotten", which featured an amnesiac Tenth Doctor flashing back to all of his previous incarnations in order to regain his memories.
    • Subtly done for the 200th story, "Planet of the Dead" (2009), which features a number 200 bus, which the Doctor refers to as "The mighty 200!"
    • For Bernice Summerfield's 20th birthday (2012), she had the charity special audio play Many Happy Returns, which brings back a number of characters and writers, and an audio adaptation of her debut Doctor Who New Adventures novel Love and War.
    • 50th anniversary (2013):
  • Transformers has had quite a few of these:
    • The UK version of the Marvel The Transformers comic, due to a quirk of publishing, ended up with over four times as many issues as the US comic. Issues 100 (1987), 200 (1989), and 300 (1990) all featured wraparound covers and double-length stories.
      • Issue 50 of the US comic featured Starscream wiping out a large chunk of the cast before biting the dust himself. This was done to pare down the Loads and Loads of Characters, though many of them (including Starscream himself) would be brought back (most, but not all, being due to new toys, of course).
      • Issue 75 saw the big battle against Unicron. Unsurprisingly, there were many more casualties.
    • 20th Anniversary (2004):
      • Toys: A huge transformable figure of Optimus Prime, complete with his trademark gun, laser axe, a miniature Megatron in gun mode, and of course, the Matrix of Leadership.
      • Transformers Energon had the episode "Distribution" being the 500th episode (arguably) of Transformers to be shown on Japanese TV. It was a weird, pointless episode that spoofed Professional Wrestling.
    • Beast Wars 10th Anniversary (2006): a rerelease of several figures along with two new figures of Optimus Primal and Megatron. All the toys had pieces which could be used to build Trans-Mutate.
    • Transformers Energon was supposed to be the huge 20th anniversary series. Results, though, were....mixed, to be polite. Animation errors, inconsistent naming, character de-evolution, an extreme focus on selling toys, fluctuating art and animation, bad editing and awful dubbing were all common for Energon. The only remaining awesome factor of Energon from its Japanese counterpart (Super Link) was the music...and not even the toyline was safe, because that also carried over the flaws of the Armada toyline.
    • 25th Anniversary (2009):
      • Toys: The original Optimus Prime toy was rereleased with the inclusion of a DVD of the first three episodes of the original series and a copy of the first issue of the Marvel comic book. Also, new toys were produced based on characters from throughout the franchise, from G1 to Transformers Armada.
      • The airing of Transformers Animated (2007-2009) coincided with this period. It celebrated by paying homage to every single Transformers incarnation previously made, even the obscure ones that were barely even released in Japan and not at all outside. Granted, many of those nods and references were All There in the Manual, but that said, the manuals (that is, the Allspark Almanac, volumes 1 and 2) are extensive and full of Mythology Gags.
    • 30th Anniversary (2014): Both Hasbro and TakaraTomy are featuring 30th Anniversary lines (Hasbro dubbing theirs "Thrilling 30", which began with releases in fall 2013).
      • Transformers: Age of Extinction was released, marking the beginning of an expected second film trilogy.
      • The sequel series to Transformers Prime was announced, though it won't debut until 2015. The new series is named Transformers: Robots in Disguise (though the name was previously used for the English dub of Car Robots in 2001, not to mention one of IDW's ongoing comic books).
      • The IDW series's mega-event Dark Cybertron and the follow-up in the ongoing series, Dawn of the Autobots, which includes the Windblade miniseries. Windblade herself was the culmination of a fan poll for the creation of a new character.
      • Toys: the Generations toyline features characters from non-G1 continuities (such as Rattrap, Waspinator, Tankor, Armada Starscream, and Fall of Cybertron Skywarp) who are represented in the IDW continuity (with their Hasbro figures including reprints of Dark Cybertron chapters). Hasbro debuted Masterpiece Soundwave to open the Thrilling 30 toyline, along with Acid Storm (an MP-11 Starscream redeco), and is reissuing MP-10 Optimus Prime (in a special "Year of the Horse" deco) and Grimlock, and debuting Prowl. Takara issued MP Soundblaster with Ratbat, and will be issuing MP versions of Wheeljack, Bumblebee (with Spike in his exosuit), Ultra Magnus, and Star Saber.
  • Warner Bros. and DC Comics have a lot on the plate across a number of their branches for the 75th anniversary of Batman in 2014:

    Fan Fic 
  • Calvin and Hobbes: The Series has an in-universe example in "The Case of the Rogue Water Balloon", wherein G.R.O.S.S. celebrates its second anniversary and its 500th water balloon attack.
  • A significant chapter of Mega Man Reawakened was posted just before the fic's second anniversary.
  • The Bridge's second anniversary will feature an animated Q&A video.

    Films — Animated 
  • Tangled has a Logo Joke for the Disney Animation Vanity Plate proclaiming the film as being the 50th movie in the Disney Animated Canon.
  • Cars came out during Pixar's 20th anniversary. To commemorate this, the Pixar logo fades into "Celebrating 20 Years" written against a black background, with Luxo Junior's light bulb forming the zero in the 20. Cars 2 celebrated Pixar's 25th anniversary with a Creator Cameo of Pixar head John Lasseter. (It also introduced an uncelebratory first for Pixarnote , but that's neither here or there.)

    Films — Live-Action 
  • Movie studios often get updated Vanity Plates on their anniversaries. Movies released during the first year of the updated logos also contain messages denoting the anniversary. (eg, The Voyage of the Dawn Treader in 2010 begins by panning up from the Twentieth Century Fox structure to some lights spelling out, "Celebrating 75 Years"note .)
    • Universal celebrated its 75th anniversarynote  by opening each movie released in 1990 with the logos that graced their works from 1927-1990, and a then-new logo (though they skipped the version that refers to them as Universal International). Fittingly, this montage first appeared at the beginning of Back to the Future Part III.
      • Universal released a similar video for their 100th anniversarynote , preceding another new logo with the ones used from 1927-2012 (they did not exclude the Universal International ident this time), but showed this montage online instead of during movies.
  • Anniversaries are generally a good excuse for Limited Special Collector's Ultimate Edition video releases of beloved films, dating back to the VHS era.
  • James Bond
  • Man of Steel was released in June 2013, the 75th anniversary of Superman's debut in Action Comics #1 (June 1938).
  • It's actually very common for superhero films to be released during special anniversaries of the characters they're adapting. The original Superman movie was released in 1978, celebrating the character's 40th anniversary. The first Batman movie was released in 1989 in time for the 50th anniversary of his first appearance in #27 of Detective Comics. The first Spider-Man film was released in 2002 for Spidey's 40th anniversary, Spider-Man 3 for the 45th, and the reboot The Amazing Spider-Man was released in ten years after the original in 2012 for the 50th. Captain America: The First Avenger was released in 2011 celebrating the 70th anniversary of his first appearance in 1941, with the announced third film coming out in 2016, in time for his 75th. It also loosely adapts the Civil War miniseries, on the 10th anniversary of that storyline from 2006. Iron Man 3 was released in 2013, 50 years after his first appearance in Tales of Suspence #39 back in 1963.
  • The first Hellboy movie was released in Spring 2004, on the 10th anniversary of the character's first appearance in comics (Dime Press #4, March 1994).
  • Star Trek:
    • Star Trek VI: The Undiscovered Country was released to celebrate the 25th anniversary of Star Trek: The Original Series as a Grand Finale that reunited the entire original cast one last time and ended the conflict with their old arch-enemies, the Klingons.
    • Star Trek: First Contact was released during the franchise's 30th anniversary, which was also being celebrated by the two TV series on air at the time(seen below in the TV section). The film sees the Next Generation crew go back in time to stop the Borg from changing history and as a result shows humanity's first contact with the Vulcans, pretty much serving as the major starting point of Trek history.
    • Star Trek Beyond is scheduled to be released in 2016, to commemorate the franchise's 50th anniversary.
  • Godzilla has had several since the first movie, which have featured Retools, Continuity Reboots and/or Grand Finales for whichever series of films Toho was working on.
    • Mothra VS Godzilla was the 5th anniversary, and the first movie to cross two Toho properties (King Kong vs. Godzilla was the first film to cross Godzilla over with another movie monster, but of course Kong isn't a Toho property). Interestingly enough, Mothra VS Godzilla and Ghidorah The Three Headed Monster were produced pretty much right in succession.
    • Ghidorah The Three Headed Monster, the 10th anniversary film, was the first time Godzilla teamed up with other Kaiju and the first time he was portrayed as defending humanity. As another note, this was also the first film to cross over more than two Toho kaiju; crossing over a total of three different kaiju movies; a record of which wouldn't be broken until 1968's Destroy All Monsters.
    • The original Mechagodzilla duology (Godzilla vs. Mechagodzilla and Terror Of Mechagodzilla), for the 20th anniversary, removed many of the Lighter and Softer elements that made the immediately preceding films so disliked while also concluding the Showa series.
    • The Return Of Godzilla, as its name implies, brought Godzilla back for the 30th anniversary along with better special effects and a Darker and Edgier tone.
    • Godzilla vs. Destoroyah, the 40th anniversary film, ended the Heisei series by having Godzilla fight a monster with origins related to the Oxygen Destroyer that killed him in the original film and then killing Godzilla off again; the film even ended with a brief montage of clips from the first film.
    • Godzilla Final Wars ended the Millennium series on the 50th anniversary by having Godzilla fight and kill almost every other monster he had ever faced.
    • Godzilla (2014) was released 60 years after the original film (though it's 6 months too early to be an exact anniversary). The months before the movie came out saw a promotional toy fair that featured models of the numerous designs of Godzilla and other monsters over the course of the franchise, along with a limited theatrical run of the original 1954 film. Ironically, it was also released just a month too late to celebrate the 40th anniversary of Mothra VS Godzilla (which was released in April of 1964).
  • Warner Bros. did a limited theatrical reissue of Willy Wonka and the Chocolate Factory to mark its 25th anniversary in 1996, and the soundtrack was finally given a CD release. When the film hit 30 in 2001, it received a special edition DVD release (as opposed to the previous Vanilla Edition) that brought back many cast and crew members for its special features, and a making-of book (Pure Imagination). For the 40th anniversary in 2011, they went the full Limited Special Collector's Ultimate Edition route with a Blu-Ray package that included the previous disc's bonus features, the book, and a few other physical extras.

  • The Mr. Men and Little Miss books celebrated their 35th (Mr. Men) and 25th (Little Miss) anniversaries with "Mr. Birthday" and "Little Miss Birthday".
  • The 1111th and the 2222nd volume of the long-running weekly German Sci-Fi series Perry Rhodan were both quite nice in-character and in-continuity parodies of the series, both written by Horst Hoffmann, who went on to announce his retiring from being a regular author.
  • Sweet Valley High celebrated its 100th book (well, actually its 97th through 100th) with its first Story Arc, a Genre Shift to horror. It worked surprisingly well, leading to more story arcs and more fantastical story elements in the future.
  • Return to Firetop Mountain celebrated both the 50th installment in the Fighting Fantasy series and the tenth anniversary of the publishing of the first book. It took the reader back to the same dungeon of the original The Warlock of Firetop Mountain to defeat a resurrected Zagor.
  • Pan Books commissioned And Another Thing for the 30th anniversary of the publication of The Hitchhiker's Guide to the Galaxy.
  • The tenth anniversary of Warrior Cats in 2013 marks the release date of the prequel series Dawn Of The Clans.
  • Charlie and the Chocolate Factory's 50th anniversary in 2014 ("50 Whipple-Scrumptious Years") was marked with a variety of events and offerings. This milestone celebration specifically kicked off on January 31st, since that's the day Charlie finds his Golden Ticket in the novel.
    • Penguin Books added the novel to their adult-oriented Penguin Modern Classics line — a ploy that went awry due to its unique, controversial Contemptible Cover featuring a girl with Uncanny Valley makeup and dress.
    • The novel had several kid-friendlier anniversary editions published too, including deluxe reissues of both the Joseph Schindelman and Quentin Blake-illustrated editions — the latter in full-color for the first time.
    • The retrospective book Inside Charlie's Chocolate Factory was published.
    • There were contests in the U.S. and U.K., and the annual Puffin Virtually Live school webcast that marks Roald Dahl's birthday was centered on the book.
    • While the 2013 West End stage musical adaptation of the novel was not specifically launched to tie in to the anniversary, it was incorporated into several of the U.K.-based events, such as the aforementioned webcast and an Easter-season window display at the Piccadilly Circus Waterstone's bookstore that recreated its sets and characters in miniature via decorated chocolate biscuits. "Celebrate Fifty Years of Pure Imagination" was a tagline for the show for a while too.
  • James Bond novel Devil May Care was released on the hundreth anniversary of the birth of Ian Fleming, the creator of the character.

    Live-Action TV 
  • Game Shows are no stranger to this trope.
    • Whats My Line: To celebrate its 25th anniversary as a series in 1975, a special two-hour retrospective of the panel game, wherein four panelists sought to identify someone's occupation or other secret, aired on ABC Late Night. It was interesting in a number of respects when it aired in late May: 1. Virtually all of the footage (except for a clip introducing then-sitting President Gerald Ford) came from the original 1950-1967 CBS run; 2. The special was hosted by original host John Daly (who was not present at all during the syndicated run), although Arlene Francis and co-creator Mark Goodson were there; and 3. The syndicated version, which had been airing since 1968, was about to wrap up its successful seven-year run. Still, it was a nice way to celebrate television's then-longest running game show, which was a constant presence for most of the past quarter century.
    • Wheel of Fortune: The 3,000th and 4,000th episodes were special retrospective episodes, featuring some of the key highlights of the (syndicated) series. The 3,000th program aired in 1998, and the 4,000th sometime in 2003. A rare photograph, printed in Jefferson Graham's "The Game Show Book," showed Vanna and Pat at the puzzle board to promote the daytime series' 3,000th episode, aired sometime in the fall of 1986.
    • The Price Is Right: With the ceremonial 5,000th episode (in the spring of 1998), Studio 33 (where the show taped) was renamed the Bob Barker Studio. The 6,000th and 7,000th episodes have all featured increased prize budgets and other pomp and circumstance.
    • Jeopardy:
      • The original version aired its 2,000th episode in early 1972. In place of Final Jeopardy! was a performance by Mel Brooks' 2000-Year-Old Man character. Various other special episodes and tournaments have cropped up during the course of the Trebek version.
      • For the Trebek version's 3,000th episode, the opening round featured the same categories used in Trebek's premiere (with new clues), Double Jeopardy! featured special categories worked around the milestone, and the Final Jeopardy! category was "Holidays", the same as the first episode.
    • Lets Make A Deal celebrated being on air for 50 years in early 2013 by having Monty Hall himself and his assistant taking over for one of the deals.
  • Bob Hope: Various shows marked one of his landmark anniversaries or birthdays, starting with "A Quarter Century of Bob Hope on Television" in October 1975. Birthday celebrations for his 75th, 80th and 90th birthdays aired in 1978, 1983 and 1993, respectively. Many of these shows featured clips from previous specials, along with pre-taped well wishes from his friends, often the sitting president at the time and the casts of various TV shows.
  • All in the Family: The 100th and 200th episodes of the series were Clip Shows, but not in the traditional sense of wrapping a "recalling old times" storyline around past clips. Rather, these were special guest stars – Henry Fonda for the 100th show, in December 1974, and Norman Lear for the 200th show (from March 1979) – providing commentary, narrating clips and introducing interview excerpts from the main cast members. A 20th anniversary special also aired in 1991, featuring retrospectives from cast members and ordinary people who agreed to be interviewed for the special.
  • Happy Days: The series' first "milestone" show came just two years into its run, titled – inventively enough – "Second Anniversary Show," and was simply Fonzie and the family laughing about past adventures. Two more "anniversary milestone" shows – titled "Third Anniversary Show" (Howard and Marion celebrating their anniversary) and "Fourth Anniversary Show" (Lori Beth writing a paper about the Cunninghams, an "average middle-class American family") – aired in 1977 and 1978, respectively.
  • Little House on the Prairie: To celebrate its fifth anniversary as a series, NBC decided to celebrate one of its rare (at the time) series hits with a special three-hour movie, "The Little House Years." This was simply extended highlights from seven of the most popular episodes of the series framed around the Ingalls celebrating Thanksgiving dinner. Although shown independently of the series, and not usually shown in syndication order with the rest of the episodes, it is canon within the TV Little House universe. note 
  • The Tonight Show: To celebrate Johnny Carson's 10th anniversary of hosting the show, a prime-time special aired, including highlights from his first decade of the show and special guests. Clips were rather limited due to much of the archives being wiped (due to reuse of videotape), although kineoscopes and video of highlights from the 1960s through early 1970s (e.g., Ed Ames' tomahawk throw, a parody of Dragnet, Tiny Tim's wedding) were shown. After then, the specials began airing annually (e.g., "Tonight Show Starring Johnny Carson 17th Anniversary Special" in 1979) until the last one aired in 1991. As the years progressed, more clips were aired since all shows produced after sometime in 1972 exist.
  • Star Trek celebrated 30 years with Star Trek: Deep Space Nine and Star Trek: Voyager doing special episodes that referred back to the original crew. Deep Space Nine did a revisioned look at the events of the classic episode "The Trouble With Tribbles" via Time Travel and Voyager also did a The Greatest Story Never Told with what Captain Sulu did during the majority of the events of Star Trek VI: The Undiscovered Country. The reason why Voyager had one featuring Sulu was that The Trouble With Tribbles was one of several Season 2 episodes to not feature Sulu (thanks to George Takei filming The Green Berets) and it just seemed strange to not include the character somehow in the 30th anniversary...
    • The Voyager 100th episode "Timeless" featured the destruction of Voyager with only two survivors from a botched attempt to return home. Harry and Chakotay used Time Travel to Set Right What Once Went Wrong, which made them fugitives of Starfleet. Adding to the occasion was guest star LeVar Burton, who also directed the episode.
    • TNG's 80th episode, which surpassed TOS' total of 79, had the Enterprise be forced to bypass a scheduled stop at the planet where the TOS finale took place.
  • The 100th episode of Buffy the Vampire Slayer coincides with the fifth-season finale, in which Buffy dies (for the second time). "The Gift" additionally was the last Buffy episode to air on The WB network before the series moved to UPN in September 2001.
    • The episode began with a Previously On segment that contained clips from every single previous episode, all going by at very high speed.
    • The canon Season 8 comics that continued the story were coincidentally released on the 10th anniversary of the first season.
  • In Angel's 100th episode, "You're Welcome", Cordelia awoke from her mystical coma and reinvigorated Angel's fighter spirit. And it was revealed that she had died.
  • Power Rangers celebrated 10 years with "Forever Red" in Power Rangers Wild Force. 10 years of Red Rangers returned for a fight that crosses over into several past seasons. They did 15 years with "Once A Ranger" in Power Rangers Operation Overdrive, which had some of the more popular (non-Red) Rangers return for another fight.
    • Power Rangers' 500th episode (during the Dino Thunder season) was a big Clip Show showcasing most of the series. It also moved the story forward a bit, as the Dino Rangers finally found out that their teacher and mentor, Tommy Oliver, was a veteran Power Ranger (the very first Sixth Ranger, and Red Ranger to the following couple teams). The very next episode saw Tommy climb back in the saddle as the Black Dino Ranger.
    • And in a bit of fortuitous timing, the final Disney season before Saban claimed the franchise back, Power Rangers RPM, ends with the 700th total episode.
    • Power Rangers Megaforce celebrates the show's 20th anniversary. It's running two years; the first year is a bit of a homage to the original Mighty Morphin' Power Rangers and the second is a franchise-wide Crisis Crossover. (The two-year thing is due to scheduling quirks on the part of both Disneynote  and Nickelodeonnote ; the adaptation of Sentai's milestone crossover season was going to miss the anniversary year, so it and the prior year was made one big storyline.)
  • On the other side of the Pacific, in 2006 Super Sentai celebrated its 30th series in GoGo Sentai Boukenger with the after-show segment "The 30 Sentai Encyclopedia", short skits hosted by the Boukengers briefly reviewing every show and every first over the past 30 years, as well as shared themes between shows. There was also the Crossover Reunion Show, featuring the physical manifestation of the 30 Years of Sentai in AkaRed, who had the power of all the past Red Rangers combined, along with a Ranger from the previous four Sentai series, AND a villain from the one before those.
    • Before that, Kousoku Sentai Turboranger was launched as the then-eleventh show (tenth anniversary) of Super Sentai. Its first episode was a special Clip Show that summarized the previous ten shows and featured 53 Sentai heroes in costume (which seems a modest number nowadays, when the first episode of Gokaiger had almost four times that amount). Interestingly, Toei decided to add two previous shows into the canon later on, making the Turboranger officially the thirteenth. The only reason they weren't included before was they lacked the Humongous Mecha.
    • There was also a 25th anniversary team-up movie featuring the Hyakujuu Sentai Gaoranger teaming with five Super Sentai members from past series.
    • On a smaller note, the 15th reunion movie, Engine Sentai Go-onger vs. Gekiranger, saw a theatrical release instead of being Direct-to-Video for being number 15; acknowledged in the movie's ending when the heroes celebrate a birthday party, and calling it "a Super Sentai birthday". Then theatrical releases for reunion movies became the norm.
    • Kaizoku Sentai Gokaiger, the 35th series, is Super Sentai's equivalent to Kamen Rider Decade, with the heroes channeling powers and mecha of previous Ranger teams. Previous Rangers themselves also make guest appearances. In a nod to the previous anniversary, AkaRed was the one who gave them their powers. They also had a crossover movie with one of Toei's other heroes, Space Sheriff Gavan, who himself was celebrating his 30th anniversary. And shortly after Gokaiger ended, Toei launched the Superhero Taisen series that crossed Sentai over with Kamen Rider, with Gokaigers vs. Decade as the plot of the first film (Toei denies that it's an intentional Milestone Celebration, but with the timing and characters involved it fits too well to not be one).
    • In 2015, Shuriken Sentai Ninninger celebrated 40 years since the debut of Super Sentai with Himitsu Sentai Goranger in 1975 by having two special guest stars in Episode 7: the two Red Rangers of the past ninja series, Ninja Sentai Kakuranger and Ninpuu Sentai Hurricanger. The episode was supposed to air on April 5, exactly 40 years to the day of the premiere of Goranger, but due to the show's entire schedule being delayed by one week because of preemption regarding the death of a Japanese journalist at the hands of ISIS, it became a belated birthday celebration on April 12; nevertheless, Episode 6, which aired on the anniversary date because of it, still acknowledged the milestone by beginning the On the Next preview with a photocollage of all 39 teams up to that point.
  • As noted under Super Sentai, the 30th anniversary of the Metal Heroes franchise was celebrated with its first hero, Space Sheriff Gavan, returning in a Gokaiger movie. This was followed by a standalone film, Space Sheriff Gavan: The Movie, that was intended to start a revival for the franchise by introducing a new Gavan, but it bombed.
  • Kamen Rider, in chronological order:
    • Kamen Rider ZX (1984), the tenth hero to bear the Rider monicker, is a low-key version. He was first advertised in a year-long promotion campaign across several mediums before finally debutting in a TV Special.
    • The deconstruction film Shin Kamen Rider: Prologue was made for the 20th anniversary of the franchise. it was released on 1992, one year off the actual anniversary of 1991.
    • Averted by Kamen Rider Agito (2001): the only thing marking the show as the 30th anniversary of the franchise is a disclaimer opening the first episode. Then again, the franchise was just fresh off a revival at the time; survival was a more pressing matter back then. However, Agito did introduce traditions that would stick for all the following years, including multiple Riders as the norm and the utter lack of ending credits.
    • Kamen Rider Kabuto (2006) had a few smaller things to celebrate the Kamen Rider franchise's 35th anniversary, including the return of blatantly insect-themed suits and after-show review segments for episode 23 to 27.
    • Kamen Rider Decade (2009), a year-long celebration of 10 years of the franchise's Heisei era in the form of a Crisis Crossover (a crisis which, oddly enough, eventually expands to celebrate the franchise's 38-year history by the end).
    • Kamen Rider OOO (2010-2011) and Kamen Rider Fourze (2011-2012) collectively celebrate the franchise's 40th anniversary.
      • The Let's Go Kamen Riders movie features OOO along with the original two Kamen Riders and Cash Cow Sub-Franchise Kamen Rider Den-O. The rest of the Riders make cameos as Big Damn Heroes during the final fight, too. The film also doubles as a celebration of the Toei Company's 60th year, which it marks with a special cameo scene where four of Shotaro Ishinomori's non-Kamen Rider toku heroes intercepting and quickly killing off a retreating General Shadow. Furthermore, episodes 27 and 28 of OOO happen to be the 999th and 1,000th episodes of the franchise as a whole, and feature the characters... filming a movie about Kamen Rider.
      • Fourze is named for "40", in-universe for the 40 Astro Switches he can use but obviously also for 40 years (in addition to continuing the previous years' Numerological Motif [Decade was 1, Double was 2, OOO was 3]). It also mentions Urban Legends about previous Riders, and uses Theme Naming that references classic Riders. Plus the traditional crossover-with-the-previous-Rider movie was expanded from just OOO and Fourze to include the first seven Riders and OOO's predecessor Kamen Rider Double. The aforementioned Superhero Taisen crossovers with Super Sentai also launched its debut movie during Fourze's run. And on top of all that, a series of joint anniversary crossover shorts with the 20th anniversary of the Crayon Shin-chan anime.
    • As the 15th Heisei-era series, Kamen Rider Gaim (2013-2014) included several events uniting the fifteen Heisei Riders. First, Gaim made his debut appearance in post-script two-parter of the previous season, Kamen Rider Wizard, that featured the fifteen Riders together. Then the Wizard/Gaim movie had them sucked into an Alternate Universe where counterparts of the Heisei Riders fought for dominance. And after that, the annual Superhero Taisen crossover became Kamen Rider Taisen, pitting the fifteen Heisei Riders against the fifteen original Showa-era Riders (and Demoting Sentai to Extras). As for the show itself, the execs took the opportunity to shake up the formula that had been in place since the Decade anniversary ended; going as far as hiring Gen Urobuchi as lead writer and letting him go full "Urobutcher" on his scripts for the express purpose of breaking down the image of the franchise as people knew it.
  • The Japanese Iron Chef had a 2000th plate special commemorating the number of dishes that had been served on the show. Chef Joel Robuchon was a special guest judge, and the Chairman Kaga chose his five favorite and three least favorite dishes to have been served on the show.
  • Stargate SG-1 had "Wormhole X-Treme" as its 100 episode, and another metahumor episode for the 200th episode.
    • Part of the plot of "200" is that Mitchell is about to take his 200th trip through a stargate. This allows them to get away with saying things like "This is gonna be huge. The big 2-0-0!" within the episode itself.
  • Friends "The One Hundredth": Phoebe gives birth to the triplets.
  • Smallville featured the death of a main character in the 100th episode. In the 200th episode, Season 10's "Homecoming", Clark lets go of his guilt over his father's death, which was the aforementioned main character death that happened a hundred episodes earlier. And, at the very end of the episode, he and Lois share a dance, and, without either of them noticing, he begins to hover.
  • The X-Files had a fake 100th episode; they claimed it to be the 100th episode in the promos but if you do the math, the episode is the 99th episode to air. Scully's cancer was cured in this episode and it also concluded a few other subplots as well. The actual 100th episode to be aired was a flashback episode that showed how the Lone Gunmen formed in 1989 and met Mulder and Scully was not in that episode. Their 200th episode was some stupid Brady Bunch episode.
  • Stephen Colbert did the 100th episode of The Colbert Report in a tuxedo, and had the same guest as on the first episode (the first ever repeat guest). The Daily Show ran segments celebrating their '10 F#@king Years' anniversary every now and then for six months.
    • The '10 F#@king Years' segments were made more hilarious by the collective cast acting as though they hadn't achieved something, but rather that they had just been through something terrible, and it wasn't over yet.
    • The Fifth Anniversary Show was supposed to be a big deal with lots of correspondents weighing in, but everyone had something else to do at the last moment and sent apology videos (Stephen Colbert's was a Video Will). Even the guest was on the other end of a satellite connection.
  • Law & Order: Special Victims Unit's 200th episode guest starred Robin Williams. Come on, you know that was meant to be special (so to speak).
  • The 100th Scrubs episode was an elaborate parody of The Wizard of Oz, directed by Zach Braff.
  • Referenced in Monk with the CSI parody episode. The actual hundredth episode of Monk features Monk's 100th case as a documentary. And then Monk ends up solving his 101st case inadvertently.
  • The 300th episode of ER had the doctors betting on the number of patients they would have that night. The winner had a round 300.
    • Its 100th episode had them host a woman who was born 100 years ago that day.
  • CSI: Miami brushed with the Trope for their 100th, "Death Pool 100". The case just happens to involve counterfeit money, specifically $100 bills, but it's easy to miss. At the end of the episode, after most of the Montage Out, the core cast gathers on a beach casually talking about the case. The conversation ends by Leaning on the Fourth Wall:
    Calliegh: Everyone thinks it's easy to make a hundred.
    Horatio: We know better.
  • Lost's 100th episode, "The Variable", which was actually #96, hinted at Tonight Someone Dies in previews (someone did, fan favorite eccentric scientist Dan Faraday), tied in advertising for the 2009 Star Trek movie as well as the show Flash Forward, and aired immediately following Barack Obama's 100th day address. As for the episode itself, it established the plan to alter the course of the series and prevent the crash of Oceanic 815. The occasion was also marked by a special Ace Of Cakes with an awesome 100th episode cake.
  • The 100th episode of Frasier has the entire city of Seattle commemorating "Frasier Crane Day", to celebrate Frasier's 1,000th radio broadcast, and also has Niles and Frasier actually on-location and walking around Seattle.
  • Seinfeld had a clip show called The Highlights of 100.
  • In the 100th episode of Charmed, the constantly switching between good and evil character Cole Turner aka Belthazor was finally Killed Off for Real. In the 150th episode, the resident Mr. Exposition Leo became human. The Avatars have something to do with both events.
  • The 100th episode of That '70s Show was a musical, with Fez imagining the cast covering some of the '70s hit songs.
  • The Ultra Series show Ultraman Mebius and its tie-in movie Ultraman Mebius & The Ultra Brothers were made "Comemmorating 40 Years of Ultraman", revisiting the original Showa era universe (Ultraman to Ultraman Eighty) after 25 years of alternate universes and featuring returning actors, characters and monsters from there.
  • How I Met Your Mother:
    • 99 episodes of almost zero amount of information about the mother, then comes along episode 100 with a huge information overflow. And Neil Patrick Harris shows off his singing with a musical tribute to suits. It played with Tonight Someone Dies by "killing off" one of Barney's suit jackets. His tailor even likening using its buttons on another suit to "organ donation".
    • "The Slutty Pumpkin Returns", the Sequel Episode to "The Slutty Pumpkin", is an in-story example — even though the series began in 2005, Ted first met the girl known as Slutty Pumpkin in 2001. The episode itself takes place in 2011, during which Ted finally meets the girl who wore the Slutty Pumpkin costume again, after years of waiting for her in the same "hanging chad" costume at the same Halloween party (not unlike Linus waiting for the Great Pumpkin).
    • The 200th episode is A Day in the Limelight for the Mother herself as she tells her side of the story at various points in the series.
  • Sesame Street:
    • The series had anniversary specials during years 10, 20, 25, 30, and 35. The 40th anniversary had to settle on-air with "40" (the highest number in the show's curriculum) sponsoring the season premiere. That season was also loaded with Continuity Nod Easter Eggs and cameos (both on-set and in photographs) of staff members and retired Muppet characters (including Kermit the Frog, who was retired from Sesame Street since the Disney buyout of the Muppets, and a generic Muppet specifically created for the Scrubs episode "My ABC's", which was an Imagine Spot-induced Fake Crossover with Sesame Street).
    • In 1977, the 1000th episode was commemorated with a primetime special on PBS entitled Sesame Street At Night?note , hosted by Gene Shalit.
  • Barney & Friends had Old King Cole come over for a visit in episode 100. Barney is reunited with some alumni to celebrate ten years, and gets a memory book after twenty years.
  • Played straight with the 100th episode of Blue's Clues, where Joe and Blue did not search for clues, instead choosing to do a Clip Show where the entire cast reminisced about their past adventures. Steve Burns even made an unexpected guest appearance visiting from "college" to disprove the countless rumors going around at the time as to why he left the show.
  • True Life so far has had a "Where Are They Now" episode for its 100th episode (2007) and its 200th episode (2011). In them, they revisited some of the most memorable people (the 100th episode included a girl with Tourette's Syndrome and a little person who was a Britney Spears impersonator, 200th episode included an alcoholic who ran over her boyfriend and a girl who had alopecia).
  • The tenth season premiere of Mystery Science Theater 3000 had TV's Frank returning to reap souls ("Second Banana Heaven was way too political") and Joel Hodgson returning to fix up the Satellite of Love.
  • The 100th episode of 30 Rock was a one-hour episode about the Show Within a Show's 100th episode, and was even titled "100th".
    • The episode also featured special guest appearances from Michael Keaton and Tom Hanks, the important plot point of Tracy deciding to leave movies to return to TV, the return of Dennis Duffy (a recurring character who was Liz's boyfriend in the first season) and a gas leak that caused the cast to reminisce about the past while in an altered state.
  • The entire 25th and final season of The Oprah Winfrey Show is a milestone celebration, with her bringing back her favorite or most shocking guests.
  • The 100th episode of Bones flashes back to how Booth and Brennan met and first worked together and has Booth confess his love for Brennan.
  • In Supernatural's 100th, Sam and Dean finally meet their half brother Adam and also rebuild their relationship.
  • Gilmore Girls 100th episode has Emily and Richard renewing their wedding vows.
  • The 100th episode of One Tree Hill has Karen return for Lucas's wedding where he is left at the altar, and Dan rescues Nathan and Haley's son Jamie after he is kidnapped.
  • The 100th episode of Desperate Housewives plays with the Tonight Someone Dies card by killing off a previously unseen character who has been a part of the main character's lives for over a decade, the flashbacks in the episode show his involvement in their lives. Season one characters Martha Huber and Yao Lin also make a reappearance.
  • NCIS celebrated their 200th episode "Life Before His Eyes" with a lot of continuity nods to the previous eight seasons. Word of God says this episode was a "gift to the fans".
  • The 100th episode of Criminal Minds was actually called "100". The episode was told in Anachronic Order with the team being interviewed by Strauss because Hotch killed an infamous serial killer who murdered his ex-wife.
  • The Vampire Diaries reached their hundred episode in "500 Years of Solitude", an episode focused on fan-favorite Katherine that also features the guest appearance of characters who left the series long ago (Jenna, John, Alaric, Vicki, the Mikaelson siblings…)
  • Meanwhile in soap operas, Neighbours had celebrated both episode number milestones and anniversaries, usually by having some big event happen in the episode in question. Especially big milestones were the 1000th episode (Des and Jane's engagement party, which was crashed by Guy Pearce), the 2000th episode (Helen's birthday party) the 10th anniversary (unaddressed onscreen, but a special book and video were released), the 4000th episode (Flick rescuing Lou and Rosie from a fire), the 20th anniversary (an in-universe documentary featuring numerous former Ramsey Street residents, some of whom returned to the street), the 5000th episode (Paul being buried alive by his murderous son Robert), and the 25th anniversary (in late 2010). The 6000th episode (and the week leading up to it) created a mystery over an apparent murder attempt on Paul Robinson's life, which kept going for several months after. The 30th anniversary is to be marked in-universe by the Erinsborough Festival, again featuring returns from numerous residents (some of which haven't been in the street since 1990).
  • Home and Away has likewise celebrated milestones such as Episode 2000 (Angel's departure from Summer Bay), 3000 (Mitch's departure, as well as Alex and Dani's car crash), 4000 (Alf's birthday party, with numerous past characters returning, which also ended in a car crash) and the 20th anniversary (which saw Sally, a regular character since the first season, leave the bay).
  • The Big Bang Theory's 100th episode focused on the possibility of Leonard and Penny getting back together. They also had special behind the scenes video with the cast looked back at the series so far.
  • JAG celebrated its 100th episode "Boomerang (Part I)" by filming it on location in Australia, and the 200th episode was a What If?.
  • Saturday Night Live parodied this with their 100th Digital Short which was a music video called "We're Gonna Suck Our Own Dicks", a big musical Call Back to all the other Digital Shorts. The show itself has had some big celebrations of its own, though:
    • The 15th anniversary was marked with a prime time retrospective that featured clips and interviews.
    • The 25th anniversary season warranted a live prime time special prior to the season premiere, featuring a variety of cast members, guest hosts, and musical guests on stage and in the audience. After that, they didn't do another special of this magnitude until...
    • The 40th anniversary special in February 2015, a prime time live show that ran three and a half a one hour Roll Out The Red Carpet arrival special beforehand! Highlights included such skits as a gigantic "Celebrity Jeopardy" round that had far more than three contestants, a medley of the most popular musical characters (Operaman, The Blues Brothers, etc.), Eddie Murphy returning to the franchise after decades of avoiding it, etc. As a bonus, in the weeks leading up to the event VH-1 Classic turned over its entire schedule to rerunning favorite episodes from every season, moving backwards to the 1975 series premiere, which aired right before the aforementioned red carpet special began on NBC.
  • November 4, 2013 is the tenth anniversary of Retro Game Master, at which point it will be considered a Long Runner. The show's celebrating it throughout the whole year.
  • The Late Show with David Letterman
    • There is often has a celebratory episode on their anniversary date (August 31) or the episode broadcast nearest the date if it falls on a weekend. The celbrants often include Bill Murray, who was Dave's guest on the first episodes of bothe Late Show and Late Night.
    • Barely a year into The Late Show Dave announced they had broadcast 1,000 epiosdes with a huge 1000 chroma key. Then he said he misread and they'd actually done 100 episodes, with a much smaller and more subdued 100.
  • The November 11, 2013 broadcast of Panorama marked exactly 60 years of the show, and so it ended with a special credits montage.



  • Many artists celebrate anniversaries of their best known albums by rereleasing them in remastered or upgraded versions. At times entire catalogues can get this treatment (such as John Lennon's one at 2010, when he would complete 70 years).
  • The Beatles released their Greatest Hits Album 1, with all their number ones, on the 30th anniversary of their break-up in 2000.
  • The Rolling Stones celebrated 40 years with Forty Licks, a Greatest Hits Album that as the title indicates had 40 tracks (4 of them new). 10 years later they did the same with the 50-track (two of them new, and one of the old ones being from Forty Licks) GRRR!, whose only disadvantage upon the predecessor was a Contemptible Cover.
  • Pearl Jam celebrated 20 years of debut album Ten with the documentary Pearl Jam Twenty.
  • blur released a box set containing all of their albums for the 21st anniversary of their first one.
  • Michael Jackson examples:
    • He threw two all-star tribute concerts to himself at Madison Square Garden in September 2001 to mark the 30th anniversary of his first release as a solo artist, though these and remastered/mostly expanded reissue of his first four albums for Epic Records was more to promote his forthcoming Invincible than anything.
    • In 2007, Thriller 25 was a second expanded reissue of that particular album that added new versions of several tracks, pairing Jackson up with contemporary hitmakers.
    • In 2012, Bad 25 was a second expanded reissue of Bad that had a tie-in documentary helmed by Spike Lee.
  • David Bowie examples:
    • He marked his 66th birthday in 2013 with the surprise announcement of his first studio album in ten years, The Next Day, via the relaunch of his official website and the release of its first single/video, "Where Are We Now?"
    • In 2014, the 3-disc Greatest Hits Album Nothing Has Changed marked 50 years of Bowie recordings, featuring the new single "Sue (Or in a Season of Crime)" to bookend his first single, 1964's "Liza Jane". This also made it the first Bowie-curated compilation to include pre-"Space Oddity" songs.
  • Anniversaries of Jean-Michel Jarre's Oxygène:
    • He celebrated the 20th anniversary by releasing the back-to-the-roots-but-still-kind-of-90s sequel album Oxygène 7-13 — about half a year late, but still. When asked back then which Oxygène is his favorite, he jokingly replied it's the third one he's going to release in another 20 years. We have yet to see whether he'll actually make a third Oxygène. After the new album came Jarre's first indoors tour, the Oxygène Arena Tour, during which neither of the two Oxygènes were played in full.
    • He also celebrated the 30th anniversary. First he largely re-recorded the original Oxygène at his studio. Then he took his three live co-keyboardists and his entire rig of about five dozen mostly vintage synths to the Belgian Alfacam Studios to re-record Oxygène yet again, this time not overdubbed but played live by these four musicians while being filmed and expanded by three Variations. The outcome was titled Oxygène – Live in Your Living Room. Next, he took this concept onto a live stage at Théâtre Marigny where he played ten concerts in a row. And then an actual tour followed with still the same concept. By then, Jarre was one and a half years late, and the last concerts of that tour were more than two years late, but the French consider being in time bad manners. All in all, Jarre celebrated the 30th anniversary of Oxygène by remaking the entire album 47 times over.
    • Some of Jarre's single concerts were Milestone Celebrations themselves. Rendez-vous Houston celebrated the 150th anniversaries of Houston and Texas and the 25th anniversary of NASA. Paris La Défense was scheduled to celebrated the 200th Bastille Day (and the 10th anniversary of Jarre's debut concert) but was delayed by one year. Oxygen in Moscow was part of Moscow's 850th anniversary.
    • By the way, Jarre played the Europe in Concert show in Brussels at the Atomium on his 45th birthday. It was his audience who celebrated him at the concert.

  • In Destroy The Godmodder, actions are more powerful and far more likely to succeed when they happen on milestone posts. The first post of a page milestone, or a number of posts milestone, a slight bonus is even given if someone calls their page claim.
    • There was also a very big and interesting event involving time travel shenanigans on the one year anniversary.

    Tabletop Games 

  • Cirque du Soleil milestone celebrations:
    • Alegria launched in 1994 as the company's 10th anniversary show; the year also saw the retrospective documentary A Baroque Odyssey.
    • The 20th anniversary of the company was marked with, among other things, the retrospective book 20 Years Under the Sun and the Midnight Sun concert in Montreal. The latter doubled as a 25th anniversary marker for the city's international jazz festival, which the concert was held at.
    • The 25th anniversary ("The Dream Continues") included a stilt-walking event centered on Las Vegas, a two-disc Greatest Hits Album featuring songs from almost every show produced up to that point, and a book on the company's costumes over the years.
    • The 30th anniversary was marked with the two-plus week run of a choral concert of Cirque music performed in Montreal's Saint-Jean-Baptiste Church and the photo book Backstage Cirque du Soleil.
    • Individual shows often mark their 1st, 5th, 10th, etc. anniversaries with a curtain call celebration during the performances that fall on the date in question, and perhaps a small gift for audience members that night (a 15th anniversary pin at "O", for instance). In Las Vegas, ads that year will include a special logo noting the milestone. Celebrations have also been held to mark a show reaching 100, 500, 1000, 1500, etc. performances.
    • There was also a special celebration for a single performer in 2012. Longtime circus performer and Mystere principal clown Brian Dewhurst's 80th birthday fell on a performance night, so a giant surprise party (yes, Surprise Party) was arranged for him, which played out over and after the two performances.
  • The 20th anniversary of the London production of Andrew Lloyd Webber's The Phantom of the Opera was marked with the BBC documentary special Behind the Mask. The 25th anniversary was marked with a mega-staging of the entire show at Royal Albert Hall (140 cast members as opposed to the usual 40, etc.), followed by a "grand finale" featuring appearances by most of the original London cast and a performance by Sarah Brightman (the original Christine); this was filmed and released on video.
  • The tenth anniversary of Les Misérables was celebrated with a concert at the Royal Albert Hall, and the 25th with a staging in the O2 arena, with The Reveal that they are making a movie musical adaptation.
  • Miss Saigon received a West End revival in 2014 to mark its 25th anniversary, and even got a new song for the occasion ("Maybe"). There was also a gala performance featuring both original and revival cast members, and tickets were dialed back to 1989 prices for that particular show.

    Theme Parks 
  • The Disney Theme Parks have interesting anniversary promotions for whenever a park reaches the 10th, 25th, etc. anniversary of its opening day, usually debuting new rides/additions to the parks, new/updated shows and parades, and usually a large gimmick. Examples:
    • For its 25th year, Disney World's Cinderella Castle was transformed into a gigantic pink cake.
    • Mickey Mouse's 60th birthday was acknowledged at Florida's Magic Kingdom with a whole themed "land", Mickey's Birthdayland, in 1988. The park kept it and tweaked its theme over the years — first it became Mickey's Starland, then Mickey's Toontown Fair — until it was torn down in The New Tens to make way for the Fantasyland expansion.
  • Almost always averted with the Universal Studios parks. There were plans to do a park-wide celebration of Islands of Adventure's 10th anniversary in 2009, but it was cut due to there being virtually no budget for it, as at the time most of it was going into the construction of The Wizarding World of Harry Potter. There was no 20th Anniversary celebration of Universal Studios Florida either, presumably for the same reason. In 2015, this was finally played straight when Universal Orlando honored their 25th anniversary, though even then the milestone nods were mostly limited to some special theming around the park and a new temporary logo.
  • Done several times with Universal's Halloween Horror Nights, first for their "Sweet 16" in 2006, then for their 20th anniversary in 2010, and once more for their 25th anniversary in 2015.

  • Nendoroids are adorable, pseudo-bubblehead figurines primarily aimed at otaku. With that in mind, the 100th release in the line is a character who falls outside of that demographic: Mickey Mouse, who is quite jarring when put next to franchises such as Touhou note  or Vocaloid.
  • BIONICLE got a line of six small sets called the Stars, a collection of remakes of characters from across the series' decade of existence. They also happened to be the last sets before the line got the can. They tend to be perceived as a rather weak way to both celebrate a milestone and end the line.
  • Barbie's 50th anniversary brought the My Favorite Barbie line of toys. Each set contains a reproduction of a famous Barbie doll, an extra outfit from the same era, and a retro pamphlet of other Barbie clothes and accessories sold at the time.

    Video Games 

    Web Animation 
  • Homestar Runner: Strong Bad tried (and failed) to answer 50 emails in a row for his 50th Strong Bad E-mail, presented his 100th email (a flashback of how he met Homestar) in widescreeeeen!, and traveled to meet alternate universe versions of himself for #150. For #200, there was a big build-up only for the resulting email to be addressed to Homestar rather than Strong Bad- it's then revealed that Homestar has had his own email show all along, which Strong Bad tries to ruin.
    • Homestar Runner started as a children's book made by the creators in 1996, "The Homestar Runner Enters the Strongest Man in the World Contest". Ten years later, they did a cartoon remake of the children's book, with the characters retaining their current, more over-the-top personalities:
    Homestar Runner: Everybody loves the me! I'm a terrific athlete!
    • Also parodied in Issue 10 of Teen Girl Squad. Keep in mind that in Teen Girl Squad, everyone dies Once an Episode:
    Cheerleader: It's our tenth issue-versary! Let's do a Clip Show!
    So-And-So: Let's have a wedding!
    The Ugly One: Let's have a baby!
    What's Her Face: Let's kill someone off!
    Narrator Strong Bad: Okay! (everyone dies suddenly in bizarre ways)
  • This practice was thoroughly mocked by Zero Punctuation. His 100th episode opened with him celebrating the event, complete with party hats and noisemakers. So, to commemorate the event, he reviews a very special game; Call of Juarez: Bound in blood. exactly the game he had scheduled anyway.
    It's just a number. 101 is also a number. And so is 99, and at least that one looks like someone getting bumfucked.
    • Later in the review, a sentence is abruptly interrupted by another noisemaker bursting out the side of Yahtzee's head, apropos of nothing. He just apologizes for the interruptiona nd goes on with what appears to be a bloodied ear.
    • Then, two episodes later, he actually does review a game he really likes: Silent Hill 2.
      And what better game to celebrate my 102nd episode?! *noisemaker*
  • How It Should Have Ended has a parody of Titanic (1997), the second highest-grossing movie of all time, as the 100th video.note 

  • In the hundredth Twisted Toyfare Theater strip, "Tonight, one of these characters will die!" Quoth Mego Spidey: "Hope it's me."
    • Note that the characters themselves have a huge party to commemorate the event - but Reed Richards secretly confides in Spider-Man that this isn't actually the 100th strip, technically speaking, due to some miscellaneous strips featured in Toyfare's sister magazines like Wizard and Inquest Gamer. As such, at the very end Spider-Man goes back in time to three issues ago and gives the huge cake from the party to the stars of the real 100th strip, the motley bunch of Stormtroopers.
  • 8-Bit Theater never does anything special for its milestones, even for its 1000th. Although the titles do sometimes reference the number, such as "Episode 255: Maximum 8-bit Hexadecimal Value is FF. Coincidence?", "Episode 404: Comic Not Found", "Episode 666: Is Just Another Comic, Calm Down", "Episode 911: It's A Conspiracy", "Episode 912: For Real Emergencies", "Episode 913: The Last Of The 9XX Jokes", and "Episode 1000: I can't believe someone was asshole enough to make 1,000 sprite comics" followed by "Episode 1001: I can't believe someone was asshole enough to make more than 1,000 sprite comics".
    • The 300th one may count, as it gave a sneak peek of the Light Warriors' class changes and major character Sarda. It also had a big Time Skip gag.
  • The Order of the Stick was intended to have the group meeting Xykon on the hundredth strip, but the writer messed up the timing, and had one character complaining about it ("And I was expecting something impressive for the hundredth episode.") Every other hundredth was something special, though. The two hundredth was the very long battle with Miko, the 300th revealed Xykon's massed army, the four hundredth was a kiss between two major characters, the five hundredth was the start of Roy watching the rest of the Order, and the six hundreth is when the POV switched back to Roy, though they repeat the same "I thought there'd be something special..." joke from the 100th episode, and then hang a lampshade on it. However, the 700th and 800th comics had nothing particularly special about them, and it wasn't even lampshaded.
  • 1/0, in addition to ending with comic #1000, dedicated comic #251 to its "1000th panel" celebration.
  • MegaTokyo used its comic #1000 to show Kimiko having a critical part of the nature of the world around her revealed to her, and revealed Miho's Little Miss Badass status in strip #1024 (#1 KB).
    • And comic 1337 is triple length, showing an Image Spot of Largo ammasing an army of Ph33rb0ts.
  • Captain SNES: The Game Masta managed to work its 200th story comic celebration into the plot. The 500th was slightly clumsier.
  • Narbonic had this very silly one-year anniversary celebration.
  • Questionable Content #666: Spontaneous metal interlude!
  • VG Cats had a flash animation for the 100th comic, and actually skipped the 200th comic with a note reading "TBA 2009".
    • Which now reads "TBA - Never".
  • Adventurers had hundreds of comics numbered 999 so that the final chapter would be number 1000.
  • Awkward Zombie has its 100th comic, in which Master Hand kills the recently returned Roy in one hit.
  • Sluggy Freelance includes a piece of simple animation every year on its anniversary (usually making someone dance to the song "X Years of Nifty Darn Comics"). The tenth anniversary featured this plus a bonus comic that referenced the "spam Satan" joke from the very first strip.
  • Darths & Droids celebrates every 50th strip by adding another level to the string of "What our webcomic is in this universe, since the thing we're parodying doesn't exist" strips following the 50th strip.
  • The KAMics is usually sarcastic about it's milestones, comic #500 is a good example of this.
  • Every hundredth Yet Another Fantasy Gamer Comic strip is in color.
  • The 200th comic of Brawl in the Family had a musical accompaniment, dedicated to all the Mooks that died at the hands of gamers everywhere.
  • XKCD skipped comic number 404, so that a 404 'File not found' error appears if someone tries to access it.
    • And for the 1000th comic, a binary joke: only 24 comics till a nice round number!note 
  • In honor of Platypus Comix's 10th anniversary, accessing the site during the week of February 7, 2011 brought up a page which resembled the homepage used in 2001. Through the Wayback Machine, the page even included links to old comics and articles, as well as a dated homepage for Platypus Comix's parent site, Toon Zone. Clicking, "Click here to restore status quo" brought up the usual website, decked out with a vertically-oriented banner, which featured characters from both ongoing and discontinued comics partying together.
    • During the 10th anniversary of Toon Zone, Peter Paltridge released an Electric Wonderland comic in which the main characters find themselves in Toon Zone's domain while pursuing a thief.
  • The Adventures of Dr. McNinja: "Happy first anniversary, Dr. McNinja!" It's a Wham Strip.
  • El Goonish Shive, used to celebrate each year of the comic with a filler comic featuring the whole main cast. It stopped doing this after the 6th anniversary but acknowledged the 9th with this filler which has links to previous milestone celebration comics.
    • For the 10th anniversary, it celebrated with a filler comic that mimics the setup and dialog of the very first comic but is in color, features transformations, references the anniversary and has a different ending.
  • Sonic the Comic – Online! celebrated the 250th issue of the series with a mega-packed issue. The issue is the largest so-far in the series, the online fancomics or the original Sonic the Comic; it also featured more artists in one issue then any other issue. It feature various cameos from characters that haven't appeared in a long time.
  • Arthur, King of Time and Space ended its first year with the Battle of Beldegraine and Arthur learning who Morgan is. It ended its second year with a timetravel flashforward. The third and fourth aniversaries just get mentioned in passing, and the fifth aniversary is the pre-Time Skip Wham Episode. Sixth passed without comment (except in The Rant), and seventh wasn't even mentioned there.
  • Played straight in Square Root of Minus Garfield in 1000th Root of Minus Garfield and parodied in Party Like It's #999 (the comic immediately afterwards).
  • Mountain Time celebrated its 500th episode with an extended-length comic, followed by 25 more comics which, seemingly in defiance of the series' norm, were pretty much straight-up Continuity Porn.
  • Keezees celebrates every 100th episode; episode 100 revealed the main character's surname; episode 200 took the form of an MP3 (warning: it's loud) which, when downloaded, recorded onto an audio cassette and played back on a ZX Spectrum, revealed episode 200 onscreen; and episode 300 was Keezees first colour episode; the author also ran a contest at that time where one lucky reader was immortalised in Keezees trading card form.

    Web Original 

    Western Animation 
  • The Simpsons had a special 300th episode...sorta. "Barting Over" was actually the 302nd episode, but Fox insisted on a special event episode to coincide with the Daytona 500. Nothing too special about the episode itself, other than guest shots by Tony Hawk and Blink 182, but there is a gag where Lisa mentions that this is the 300th time that Homer has done something crazy with Marge saying she counted 302.
    • Its 500th episode had a couch gag that showed all the previous 499 couch gags, all continuing to pan skyward as they play out until it stops with the multiple incarnations of the family sitting at their couch, forming a mosaic "500". In addition, the chalkboard gag is Milhouse writing "Bart's earned a day off" and the opening logo includes a caption declaring "The most meaningless milestone of all!", referencing the chalkboard gag from the 100th episode. Also, Lisa's playing a sousaphone for some reason.
      • The gag for the 499th episode was a surprise 500th episode party. When Lisa points out the error, Moe replies, "Well, guess what? Fox isn't doing this again."
    • They also spoofed their actual 100th episode — all they did was have Bart write the lines "I will not celebrate meaningless milestones."
    • The 400th episode, "You Kent Always Say What You Want", opens with The Tracey Ullman Show short "Family Portrait".
    • They also parodied this trope with "The Simpsons 138th Episode Spectacular", the third Clip Show episode.
    • Episode 167 was the episode that tied the show with The Flintstones as the longest-running animated prime time show. "The Itchy & Scratchy & Poochie Show" featured a lot of Lampshade Hanging on various Animation Tropes. Some versions of the episode use the couch gag where the family find the Flintstones already sitting there.
    • The 20th anniversary was marked with the documentary The Simpsons 20th Anniversary Special: In 3-D! On Ice!, directed by longtime fan Morgan Spurlock (Super Size Me) and broascast on January 10, 2010, following the 451st episode (which Fox promoted as the 450th for whatever reason; had they not promoted it as such, the documentary would have aired on January 14, the original broadcasting date of "Bart the Genius").
    • Their 550th episode has Springfield reimagined as LEGOs. Notably, the LEGO aspect was promoted and not the episode count.
      • In addition, a contest was held for fans to introduce a new character to the show. The winning entry was Ricardo Bomba, a South American ladies' man who works as a safety inspector at the nuclear power plant. The episode where he made his debut killed him off before anything could be established about him. However, executive producer Al Jean said it's possible Ricardo might appear again.
    • Spoofed in-story in "I Love Lisa" with The Krusty the Klown 29th Anniversary Show.
  • South Park's 97th episode "Canceled" was clearly intended to be the 100th (with the Leaning on the Fourth Wall moment and all), but it was instead aired as the 97th so as to be the Season 7 premier, taking advantage of its Mind Screw opening that mirrored the Pilot Episode. The actual 100th episode, "I'm A Little Bit Country", had a tacked-on "100 episodes" acknowledgement at the end.
    • The 200th episode is the first of a two-parter and features a story involving every celebrity the town has ever pissed off; the second part is also a Wham Episode for Cartman: His true father is also Scott Tennorman's.
  • Spoofed in the Looney Tunes short "Blooper Bunny", which celebrates Bugs Bunny's 51 1/2 anniversary with a brief dancing number. Most of the cartoon is behind-the-scenes footage and Hilarious Outtakes of said dance number.
  • Spoofed in Animaniacs, with the Warners' 65th Anniversary Special (referring to their backstory of being created in The Thirties). In actuality, this was the 65th episode and first season finale. In a more literal sense, the direct-to-video movie Wakko's Wish is essentially the show's 100th episode and series finale.
  • Spoofed in Space Ghost Coast to Coast with its 37th Episode Anniversary.
  • Family Guy:
    • The 100th episode (excluding the splitting of the DVD movie into seperate episodes for broadcasting) was Stewie Kills Lois, kicking off a two-parter in which Stewie finally realizes his ambition to kill his mother and conquer the world...or so it seems.
    • The 150th episode was an experimental story called Brian and Stewie in which only the two title characters appear, the entire episode is confined to a single scene, and there are no cutaway gags or even music.
    • The 200th episode, "Yug Ylimaf", involves Stewie and Brian accidentally reversing time and revisiting moments from older episodes.
  • SpongeBob SquarePants' 10th anniversary special was an hour long and featured live action appearances by Will Ferrell, Craig Ferguson, Tina Fey, Rosario Dawson, LeBron James, P!nk, and Robin Williams. And Ricky Gervais was the narrator.
    • The plot for the episode itself was that the Krusty Krab was celebrating its eleventyseventh anniversary. This prompted the characters to reminisce, only instead of a standard Clip Show, the flashbacks are all new.
  • The Fairly OddParents 100th episode was the final part of the Big Damn Movie "Wishology". Plus, for it's 10th anniversary celebration, a live-action movie, "A Fairly Odd Movie: Grow Up, Timmy Turner!", was released, in which we see the characters 13 years in the future.
  • While the series itself never reached 100 episodes (unless you count Demashita! Powerpuff Girls Z), The Powerpuff Girls had a 10th anniversary special years after the show ended, which celebrated everything fans loved about the show compressed into 25 minutes. That would be wordplay, self-referential humor, homages & parodies, wit, and the occasional song.
    • For those wondering it ended with Mojo Jojo creating a tranquil world free of all the past old problems of war and starvation (much to the girls surprise). Then gets bored by all the peace, so everything returns to the status quo.
  • Turtles Forever, a celebration of 25 years of the Teenage Mutant Ninja Turtles that also serves as both a Grand Finale for the 2003 series and a fitting send-off to the Mirage era of the franchise as a whole, what with it being sold to Nickelodeon shortly before its airing.
    • Also, the 100th episode of the 2003 series is a special episode depicting the story of Master Splinter's owner Master Hamato Yoshi.
  • Spoofed on KaBlam!. The show is all set for its 100th episode, complete with a stadium, dancers, red carpet, fancy dress, etc. Then, maybe thirty seconds after the show starts, a stagehand tells Henry and June that it's only the 24th episode. Unfortunately, it was the 17th episode aired on Nickelodeon.
  • Futurama's 100th episode is another spin on the RMS Titanic tragedy (this was done before in the show's 10th episode, which featured a spaceship version of the cruiser as its main setting, but this episode uses a "Land Titanic" for its backstory), but nonetheless shook up the status quo a bit by having Leela's heritage as a mutant accidentally outed, giving the mutants equal rights, and even pulling a Like You Would Really Do It by making it look as if Fry mutated himself. And of course, the Lead In for this episode is the Planet Express crew making their 100th delivery, and the party celebrating it serves as a minor B-plot.
  • American Dad! begins its 100th episode with Roger dressed as the Grim Reaper, telling viewers that to celebrate the milestone, they're going to kill off 100 characters. There's even an on-screen counter to keep track of the deaths. The show keeps its promise, though 97 of those deaths belong to background characters who are killed all at once in a bus crash.
  • Aqua Teen Hunger Force's 100th episode paid homage to Scooby-Doo, and also features a subplot of Master Shake visiting the show's executives (in the form of Dana Snyder, no less), trying to bring the show into syndication. However, since the show is only a Quarter Hour Short, it only has fifty half-hours of material.
  • The 100th episode of Regular Show, "A Bunch of Full-Grown Geese", is full of call backs, starting with the return of the baby ducks from "A Bunch of Baby Ducks" (which is also alluded to in the episode's title). Later, when Mordecai, Rigby and the ducks merge into a Humongous Mecha, various items from previous episodes (the magic keyboard from "The Power", the trucker hat from "Eggcelent", etc.) make an appearance.
  • The 100th episode of Total Drama "Zeke and Ye Shall Find".
  • For The Legend of Korra, there's the episode "Venom Of The Red Lotus". Not only is it the 39th episode in this show, but it's also the 100th episode in the entire Avatar: The Last Airbender franchise. And the episode ends with Jinora becoming the first master Airbender in the newly-remade Air Nomads, having shaved her head and looking just like her grandpa Aang.
  • My Little Pony: Friendship Is Magic: The 100th episode, actually titled "Slice of Life" stars a good number of minor and background characters. The episode itself centers around the wedding of two minor characters. The main cast only appeared in backgrounds, and only two of them (Twilight Sparkle and Rainbow Dash) spoke at the very end of the episode.
  • Cartoon Network's 20th anniversary celebration. They temporarily re-aired episodes of many of their classics, brought in a set of bumpers featuring numerous Crossovers, and then there was the rather psychedelic music video and poster, featuring over a hundred characters from nearly every cartoon ever shown on CN.
  • Ben 10:
    • The 100th episode of the franchise is fairly episodic in nature with not one Callback in the entire thing. In fact, it only stands out because it's one of the few episodes that has a Downer Ending.
    • The 199th and 200th episodes (In production order) of the franchise deal with a time traveling Villain Team-Up that has a group of evil Bens ready to defeat and conquer every universe. Ben is joined by other alternate versions of himself (A few of them had already been stablished way back in the first series) and has a reveal that Ben got the Omnitrix because a version of him that never obtained it, along with Paradox, manipulated the events of the first episode.