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Intercontinuity Crossover

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From rivals of the Console Wars to rivals on the Olympic playing field.

A crossover between two works that are not within the same Canon or Continuity.

Having a Crossover between two related shows is one thing — it's not inconceivable that some of the Cheers cast should turn up in Frasier, is it? Or that characters from JAG could turn up on NCIS. Or that the CSI team might help out the guys in CSI: NY every now and again.

What happens when Jay and Silent Bob turn up in Scream 3? Or Cliff and Norm from Cheers book into St. Elsewhere for medical attention? Or a police officer from the grittily realistic Homicide: Life on the Street arrests Fox Mulder of The X-Files? Or the CSI team finds a corpse in a hotel that isn't a corpse, just Angel? Well, then you've got yourself a different kettle of fish altogether. And to add insult to injury, the fish are probably from Finding Nemo and The Little Mermaid.

There are a few reasons why this happens. Sometimes it's because both series are owned by the same network or company, and it wants to improve the ratings on the one show by having the cast from the more popular show appear in it. Sometimes it's because both shows share writers or producers and they think it would be amusing to link the two. And sometimes it's just because someone somewhere thought it would be cool.

Most crossovers of this kind are between properties that are owned by the same company or person, which makes legal wrangling easier. But sometimes characters will cross over into another company's properties, like the occasional events from rival comic book firms DC Comics and Marvel Comics.

It makes quite a difference whether the crossover reveals that the characters have supposedly been sharing the same world the whole time; or if they're "just" from Another Dimension. While not as big a deal if both series are "relatively" realistic, such as Crime Dramas, if each show has its own version of fantastic events a la Fantasy or Science Fiction; then the implication is that these elements have been existing side by side the whole time, unaware of each other. It also makes for some great Fridge Logic. "Hey, Problem A for Cast B is no big deal, if Cast A and B are friends, why don't they just ask for help?" Of course, Superman Stays Out of Gotham, and Reed Richards Is Useless as always.

For more information and examples, see Thom Holbrook's Crossovers and Spin Offs Master List, which documents all known crossovers between TV series, except for cartoons. With this information, the site has been able to identify no fewer than 38 contiguous TV "universes" (as of March 2008) which are home to widely disparate (and apparently unlikely) combinations of series from different eras and networks. For instance, see Holbrook's "Group 2"ninety-four series (as of March 2012) ranging from Six Feet Under and Everybody Loves Raymond to Law & Order and The X-Files, taking in M*A*S*H, Cop Rock, and Home Improvement along the way. Thanks to the baroque web of interconnections and crossovers, it is suggested that these shows all inhabit the same universe. (Holbrook also discovered the "Jean-Claude Van Damme is dead" plague that poses a grave threat to any future crossovers including Star Trek and other Group 10 shows.)

It has been noted on this and other sites that the web of crossovers connects many shows, directly or indirectly, to St. Elsewhere. Since that entire series was shown in its final episode to be the fantasy of an autistic mental patient, it has become a Stock Epileptic Tree that all of reality is All Just a Dream of an autistic mental patient. In the words of Dwayne McDuffie, one of the executive producers of Justice League, "The last five minutes of St. Elsewhere is the only television show, ever. Everything else is a daydream."

Some fanfics specialise in lobbing together lots of fandoms together in one big Mega Crossover. (And speaking of fanfics, if you're not sure if a crossover exists for a given pair of fandoms, remember that Rule 50 is in effect - it probably exists somewhere.)

When this trope happens with three or more series instead of two, it's a Massive Multiplayer Crossover. When the two settings are blended so as to be one unified setting that partakes of elements from both, that's a Fusion Fic.

When each others' works of fiction appear in-universe as fiction in a stable fictional loop, that's Mutually Fictional. When a work of fiction itself appears in its own story, that's Recursive Canon.

Compare Crossover, Fake Crossover, Weird Crossover, Public Domain Canon Welding. See also Transplant, Fully Absorbed Finale, Guest Fighter, and Ultimate Showdown of Ultimate Destiny.


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    Anime and Manga 
  • Cyborg 009 vs. Devilman is something many people didn't see coming, since Cyborg 009 is a story about cyborg superheroes with very minimal violence, while Devilman is a story about a demonic superhero killing other demons with tons of blood and gore, absolutely nobody thought two opposite series would get such a crossover. Thankfully it works for the most part.
  • Part of the Red Ribbon Army story arc on Dragon Ball had Goku chasing Captain Blue to Penguin Village, the setting of Akira Toriyama's earlier manga/anime, Doctor Slump, and featured appearances by Arale, Dr. Norimaki, and several other characters. This appeared in the manga and anime (since both shows were made by Toei and aired on Fuji TV); moreover, when Doctor Slump was animated again in 1997, a new Dragon Ball crossover was written in.
    • Dr. Slump made another crossover appearance in Dragon Ball Super, with a bit of Leaning on the Fourth Wall by Vegeta of all characters, as he notes that his usual fighting style won't work against a Gag Series character like Arale. There was also an earlier cameo by Arale in the episode where, due to suffering from temporary Power Incontinence, Goku couldn't properly control his Instant Transmission, and ended up back in Penguin Village for a few seconds.
    • Toriyama already did that in Dr. Slump itself: there was one chapter where the characters traveled to Wonder Island, the set of the titular manga (and Toriyama's very first published work).
  • The AIR/Kanon crossover manga (Key/Visual Arts).
  • Apparently mostly because the author of Fairy Tail really liked Flunk Punk Rumble they made a crossover called Fairy Megane.
    • That the author of Flunk Punk Rumble's favorite author happens to be the author of Fairy Tail probably helped, as well a former assistant of his. What's most stunning of all is that despite being SERIOUSLY WTF, it actually ain't half bad.
    • Fairy Tail also had a crossover with the story Mashima wrote before it, Rave Master. The Jiggle Butt gang appeared in the anime as well.
  • The Fate/stay night X Magical Girl Lyrical Nanoha and Magical Girl Lyrical Nanoha X Fate/kaleid liner PRISMA☆ILLYA collaboration manga that both started in the March 2010 issue of Comp Ace magazine.
  • Lupin III
  • Dragon Ball and One Piece in Cross Epoch.
    • At one of the Jump Fiesta events they featured another crossover of Luffy and Goku going up against Eneru above the city of Tokyo. Other characters get short cameo and Ryotsu of Kochikame made an appearance (as seen here). They would later do this again only this time against Arlong and Astro Boy was thrown into the mix.
  • Slayers VS Orphen
  • Rodimus's backstory in Transformers: Energon states that he left Cybertron with a band of Autobots and "traveled into the future", which reflects the ending of Transformers: ★Headmasters, in which he ventures off into space to find/found a new home planet.
  • To promote the Jump Super Stars game for the DS, a manga was included for those who preordered drawn by the people behind Eyeshield 21. A standard "sucked into a world to defeat the villain" affair but damn if it's not cool seeing Naruto, Luffy, Goku, Toujou, and Bobobo work with Seta to kick Dr. Mashrito's butt.
  • It's not much, but in Mobile Fighter G Gundam, during the finale episode where all the world's Gundams had banded together to fight the Dark/Devil Gundam, you can see Gundams from other series in the mob. For example, both the standard RX-78-GP01 and the RX-78-GP01Fb Full Vernian, the Wing Gundam, RX-78-2, etc. They weren't kidding when the said they had all the Gundams! In the case of the Wing Gundam, it was an Early-Bird Cameo, as Gundam Wing debuted the week after G Gundam ended.
  • In-universe example in Bakuman。: Crow and +Natural are two manga drawn by the same artist, the former about a crow-man (or something like that, the premise is never stated), while the latter is about a kid who finds he's psychic. Fast forward to a time where +Natural is doing poorly while Crow remains among the most popular of Jump, and you get the protagonist of Crow showing up in +Natural, saying he's also a psychic. (We only know so much about the Shows Within A Show, so we can't be sure that they're in different continuities, but given the plots and the characters' reactions, this seems to be the case.)
  • There's also the Minky Momo vs. Creamy Mami OVA.
  • This has become a trend with Shonen Jump manga, and the anime adapted from them.
    • Gintama and Sket Dance had a crossover chapter for each manga, and two corresponding crossover episodes.
    • Toriko and One Piece had two crossover episodes (one of which was adapted from a manga crossover).
    • Later on, One Piece, Toriko, and Dragon Ball Z had a crossover episode, though it obviously had no bearing on the continuity of any of the anime involved. It does reference their previous crossovers by having Toriko and Luffy recognize each other; however, they have no idea who this Goku character is...
  • The plot of Re:CREATORS features the characters of numerous unrelated fictional series appearing in the real world. In order to stop one of the Creations who's gone Omnicidal Maniac, the writers of the works involved are brought together to create a massive crossover event for their characters as a means to empower the heroic Creations and fight against the Big Bad. An issue the creators face in this endeavor is merging multiple, sometimes vastly different worlds into one story and making it something the audiences will accept, which is pivotal to making the plan work.

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    Comic Books 

    Fan Works 

    Films — Animation 
  • Several animated film studios do toolkits that combine characters from some of their films.
    • DreamWorks Animation does this from time to time, mainly with characters from Shrek, Kung Fu Panda and Madagascar.
    • Pixar used to do this in their bloopers and credits.
    • Laika normally does this to celebrate holidays.
    • Illumination Entertainment does this more often than you'd expect, from pairing up the minions with charcters from other franchises to bringing them all together, in their marketing and logos.

    Films — Live-Action 

  • Star Trek: The Original Series tie-in novel Ishmael by Barbara Hambly is an unlicensed crossover with the 1968-1970 ABC series Here Come the Brides, including several Mythology Gags spanning both series and a number of Shout Outs. The book also has crossover elements from Have Gun – Will Travel, Doctor Who, Star Wars, Battlestar Galactica (1978), Bonanza, and Maverick, making it also a Massive Multiplayer Crossover.
  • There is a novel where Picard meets the X-Men: (Planet X). It includes a rather awesome Hilarious in Hindsight moment when people point out how much Professor X looks like Captain Picard. This is made even funnier by the realisation that the book was published over a year before X-Men was filmed. There are apparently very few charismatic bald actors to go round...
  • Diane Duane is a Doctor Who fan, and as a result the Doctor (in different incarnations) has appeared in both her Young Wizards series and in one of her Star Trek novels.
  • Neil Gaiman won a Hugo Award for A Study in Emerald, his crossover between Sherlock Holmes and the Cthulhu Mythos. Deservedly — the story is awesome. It can be read here for free, in nifty newsprint format. Do so now.
  • The basic concept of the Thursday Next books is that all novels are connected through the Bookworld, and Thursday can travel to them. For obvious reasons, the books Thursday enters are mostly public domain, but the cast of Enid Blyton's Shadow The Sheepdog, Beatrix Potter's Mrs Tiggywinkle and Kathy Reichs' Temperance Brennan have all appeared with permission. (Of the estates in the first two cases, obviously.)
  • The Doctor Who character Iris Wildthyme (see here for character tropes) started out in a wildly unrelated series of non-genre novels. The author proceeded to use her in Doctor Who novels with no change whatsoever to her character. She then got her own Big Finish spinoff and a number of appearances in the comics. Unlike with other not-quite-canon Doctor Who companions, Big Finish makes no effort to prevent a Continuity Snarl with her, and Iris somehow being part of several different continuities all at once is considered part of her charm. Within her own series, Iris also has a tendency of travelling to other fictional universes, such as meeting up with Robin Hood.
  • The Doctor Who New Series Adventures novel The Coming of the Terraphiles, by Michael Moorcock, is a crossover with Moorcock's Second Ether sub-series, absorbing the Doctor Who expanded universe into Moorcock's Multiverse. (Moorcock’s story “The Vanishing Tower”, had already featured some suspiciously ‘’Doctor Who’’ elements, including the TARDIS-like vanishing tower itself.)
  • In a story that Karl Edward Wagner contributed to Tales of the White Wolf, Kane of Kane Series makes an uneasy temporary alliance with Elric.
  • W.G. Grace's Last Case by Willie Rushton is set a few years after the Martian invasion from The War of the Worlds, and has the real cricketer Grace investigating a murder with the help of Doctor Watson, who is at a loose end after Sherlock Holmes fell down the Reichenbach Falls. Along the way they meet Doctor Jekyll and a whole host of Mister Hydes.
  • Temeraire: The Golden Age and Other Stories collection of varyingly canon side stories includes "Dragons and Decorum", wherein Pride and Prejudice's Elizabeth Bennet is a Dragon Rider in Temeraire's British Aerial Corps.
  • Joanna Russ included a reference to Fahfnr in The Adventures of Alyx as a Shout-Out, with Alyx claiming he was a former lover. Fritz Leiber then confirmed the relationship in later Fafhrd and the Gray Mouser stories.
  • Courtney Milan did this to two of her own projects, writing an explicitly non-canon side story for her website crossing over her Brothers Sinister historical romance series, set in the 1830s-1880s, with her Cyclone series set in 21st-century Silicon Valley. Time travel is involved.
  • Haganai and Student Council's Discretion have two crossover stories, each written by the series' respective authors.

    Live-Action TV 
  • The king of the intercontinuity crossover is undoubtedly Detective John Munch, played by Richard Belzer, who has appeared as of Summer 2007 on ten different programs. Originally a regular on Homicide: Life on the Street, during the course of that series he appeared in three crossovers with Law & Order. When Homicide finished he went on to become a regular in Law & Order: Special Victims Unit. Not only that, but he also made guest appearances in Law & Order: Trial by Jury, The Beat, Paris Enquêtes Criminelles, The X-Files, Arrested Development, and Sesame Street. And in August 2007, he filmed an episode for the fifth season of The Wire.
    • Interestingly, there's an episode of Homicide in which Munch refers to people "watching The X-Files." You could take this as a paradox, or you could figure that Munch — a hard-core conspiracy theorist — leaped at the chance to play himself in an X-Files episode. Which might explain why the interrogation room in that X-Files ep looked completely different from the interrogation room in Homicide.
    • There is uncertainty over whether Belzer appears as Munch on The Wire; the character was not named and received a generic billing. He mentioned that he used to own a bar, however, which he did in Homicide, so there's some evidence that it was intended to be Munch.
    • Taken even further with Luther, in which the titular character tells a subordinate to check out an American felon by sending their profiles to Munch in New York. Celebrity Paradox kicks in, considering that the London cop John Luther and Baltimore gangster Stringer Bell in The Wire are both played by Idris Elba.
  • MTM shows did this occasionally. Carla from Cheers talked about having given birth at St. Eligius, aka St. Elsewhere, and the doctors showed up at the Cheers bar once. Sam also once directed patrons to take an ailing man to St. Eligius. Similarly, Bob from The Bob Newhart Show made reference to St. Eligius, while Bob's secretary Carol showed up on Murphy Brown as a temp for Murphy, thereby enfolding it into the autistic daydream which ended St. Elsewhere. See above for more information.
  • The TARDIS, the Living Ship from Doctor Who, has appeared in the sitcoms Red Dwarf (set in the far future) and Chelmsford 123 (set in 123 AD).
    • The Doctor and Rose showed up for a panel of Buffy Season 8, which means that aliens and demons may (if it's canon) exist in the same universe.
    • The Doctor Who/EastEnders crossover (of very dubious quality, but it was for charity) Dimensions in Time could also be mentioned, although it's actually not in either of the shows' continuities (and indeed, since then they've both featured each other as fictional programmes).
    • The Kaldor City Doctor Who Expanded Universe audio dramas written by Chris Boucher and produced by Magic Bullet are set in the titular city from the Doctor Who story The Robots of Death (also by Boucher), but feature Scott Fredericks reprising the role of Psychostrategist Carnell from the Blake's 7 story "Weapon" (also by Boucher). A History by Lance Parkin (an exhaustive unofficial history of the Whoniverse) makes a valiant attempt to claim that B7 may well be set in the Whoniverse, but really it's probably best to assume he's an Alternate Universe counterpart. Or just don't worry about it. (There's also a cynical manipulator played by Paul "Avon" Darrow, who knows more about Carnell's Federation background than the Kaldorians, but let's not even get started on that...)
    • Similarly, back in the heyday of Marvel Comics' British arm, there were several crossovers between the Doctor Who Expanded Universe (or at least the DWM comics branch of it) and the Marvel Universe. The first and most notable was the Special Executive, a Time Travelling Ragtag Bunch of Misfits created by Alan Moore. Originally introduced in DWM as ancient Gallifrey's Special Ops, they later appeared in Moore's Captain Britain, where they were mercenaries.
    • Marvel also linked Doctor Who with Transformers, by way of bounty hunter (sorry, "freelance peacekeeping agent") Death's Head. This is a borderline case, however, as the link only occurred when Death's Head fell through a dimensional rift from the Marvel UK Transformers universe and ran into the Doctor as a result.
      • In a more solid (possibly) example, the obscure character Octus has been stated to have a Dalek altmode. He was never seen transformed, but Word of God says that's what he turned into.
    • Gallifrey itself... or rather what was left of it... shows up in the Power Rangers Lost Galaxy episode Green Courage with Coordinates to boot, This aired in 1999, six years before the new series, by the way.
  • It appears that the soap opera Passions has set itself up as a sequel of sorts to the classic Fantastic Comedy Bewitched. It features Juliet Mills as Tabitha Lennox, a genuine witch whose daughter is named Endora and whose parents are a mortal named Darrin and a witch named Samantha. Furthermore, Bernard Fox has made two appearances on the show as his Bewitched character, Dr. Bombay.
  • The Power Rangers in Space encountered the five Turtles from TMNT: The Next Mutation... but, uh, we don't like to talk about the latter group around here (and neither do Eastman and Laird).
  • The Friends episode "The One With Two Parts" introduces Phoebe's twin sister Ursula, who was a character on Mad About You. Both had been played by Lisa Kudrow, so it was an obvious choice (to the network, at least) to make the previously unrelated characters twins. That same episode had Jamie and Fran from Mad mistake Phoebe for Ursula.
    • One episode of Mad About You itself revealed that Paul's old apartment was being loaned to Kramer from Seinfeld.
      • And later it was revealed that the series Mad About You exists in the Seinfeld universe. Maybe it's a reality show?
    • Another Mad About You episode had Carl Reiner guest star as Alan Brady, his character from The Dick Van Dyke Show. This created a bit of a paradox, because in an episode of Friends (which would seem to be in the same "universe") the characters are shown watching ''The Dick Van Dyke Show."
      • Not as much as you might think: The actual DvD show ended with Rob Petrie trying to find a buyer for his life story, and Alan Brady hinting that he might want to turn it into a show, which is so meta it hurts. So, it's possible that, in the fictional world where Rob, Laura, and Alan Brady live or lived alongside the Mad and Friends characters, Alan Brady eventually settled on Dick Van Dyke to play Rob Petrie — brain exploding must stop...
    • Also, Chandler briefly appeared in a Caroline in the City episode, and Caroline briefly appeared in a Friends episode.
    • Ross appeared in an episode of The Single Guy, playing an old schoolmate of Jonathan's.
    • Daphne and Niles of Frasier were on an episode of Caroline in the City, too, so that links Frasier (and, by extension, Cheers) into this little sitcom world, too.
      • And since Cheers linked itself to St. Elsewhere, that drags all of 1990s Must See TV into the autistic kid's dream.
    • Some people Fan Wank Greg House into the series as the passenger that tells Rachel off on her flight to England due to neither caring about the feelings of a nearby person and both being played by Hugh Laurie. Depite the fact Laurie clearly isn't playing the character as American.
  • Early Edition crossed over onto Martial Law. Early Edition also featured several regular characters from Chicago Hope in one episode.
  • Martial Law also had a crossover with Walker, Texas Ranger. The first episode takes place on Martial Law and begins with the characters standing in their station discussing a recent crime. Then a voice rings out from off-screen, saying "I hear you could use some help." And then the camera shifts to a pair of cowboy boots and slowly pans up to reveal Ranger Cordell Walker, illuminated by a bare lightbulb overhead like some pagan godling. Then he and Sammo team up to stop violent, genocidal white supremacist militia members attempting to steal chemical weapons to use to ethnically cleanse Los Angeles. This is followed by an episode of Walker, Texas Ranger where Sammo visits Texas to help finish up the case. Sammo's extra-sensory and clairvoyant Chinese Daoist powers are accepted by the Rangers without a word of doubt. As Walker's long-suffering partner Trivette explains, "Around here, we call that sort of thing "Cherokee."
  • The Pretender had crossovers in paired episodes with The Profiler, and the relationship between the two characters was kept in the continuity.
  • Despite concepts seemingly custom-made for crossovers, JAG and NCIS only crossed over for one two-parter. Though NCIS didn't exist as a separate show when the crossover happened. In other words, a Poorly Disguised Pilot.
    • JAG's Lt. Bud Roberts did appear in the first season NCIS episode Hung Out to Dry.
    • Meanwhile, Lt. Cmdr. Faith Coleman and a Navy SEAL played by Adam Baldwin appeared on both series.
  • It's not quite Archie Meets The Punisher bizarre, but the special Alice two-parter that featured a visit from Boss Hogg, Roscoe and Enos from The Dukes of Hazzard (Boss Hogg was Not-Flo Joleene's cousin) is up there.
  • ITV drama series Footballers' Wives briefly exported popular character Tanya Turner to Bad Girls (also produced by ITV) when Tanya was jailed during the plot.
  • The creators of Lost and Heroes have discussed the possibility of intertwining their shows, but are largely unable to do so because they are on different networks. However, small details have crossed over. Characters on both shows have sported identical brochures for the fictitious Gannon Car Rentals.
    • Lost has also featured a few shoutouts to Alias, though it's unlikely they exist in the same universe due to Terry O'Quinn's characters in both shows being completely unrelated.
      • Actually, they do exist in the same universe, as a CIA agent is shown listening to one-hit wonder Drive Shaft, "You All Everybody", on his workstation. Ergo, Charlie Pace (played by Dominic Monaghan) is part of the Aliasverse, meaning LOST is part of it as well.
      • Likewise, an Oceanic Airlines flight to Sydney was mentioned in passing on Alias.
      • An Oceanic Airlines ad also appeared during the pilot episode of Flash Forward.
      • The disappearance of Oceanic Flight 815 was mentioned in passing on Fringe.
      • This could be because Oceanic Airlines is a generic name that a lot of shows use. The Other Wiki has details.
    • Also, the big "cork" on the bottle of evil at the end of the show pretty closely resembles a Hellmouth. Probably not intentional, but wouldn't it explain everything?
  • Speaking of Lost, one of Chef Robert Irvine's missions on Dinner: Impossible was to cook for the cast of Lost. Though it was clear to everyone that Lost is only a television show, Nestor Carbonell did appear in character as Richard Alpert and Robert was given several Dharma food drops to work with, so it qualifies somewhat for this trope.
  • In an episode of Reba involving a court, the judge is obviously intended to be Philip Banks from The Fresh Prince of Bel-Air, and is played by the same actor, despite Reba taking place in Houston and Fresh Prince taking place in California.
  • Crossing Jordan and Las Vegas crossed over so often that it probably doesn't even qualify as intercontinuity crossover. They certainly take place far enough apart geographically that it's plausible that they're within the same continuity. I think that the Crossing Jordan characters made one more appearance in Las Vegas after their own show had been canceled, though both shows are now finished.
    • In one LV episode, Mary made a reference to booking a conference room for Dunder-Mifflin, and Heroes and the 2008 Knight Rider series have both made references. Linderman being involved would certainly explain the Montecito's high owner turnover rate. Don't combine it with the Lost bit above, though, or your head might explode.
  • When a mentally ill patient filed a paternity suit against Dr. Kiley on Marcus Welby, M.D., the trial was resolved by Owen Marshall: Counselor at Law.
  • Picket Fences crossed over into Chicago Hope (both shows created/executive produced/written by David E. Kelly and airing on CBS), when Fyvish Finkel's character Douglas Wambaugh checked into the hospital. They also poked at ER featuring a "commercial" for the hospital that parodied the opening credits of ER and later having one character say, "We don't like to talk about that other hospital."
  • Because both series were produced by William Dozier, it was practically foreordained that The Green Hornet and Kato would make an appearance in Batman, which they did in the episodes "A Piece of the Action"/"Batman's Satisfaction", which aired on March 1 and 2, 1967, as well as an appearance in a brief "window gag" in another episode. The styles of the two shows didn't really mesh, however.
    • As for the styles of the shows not meshing, in the Hornet's "window gag" appearance (the earlier of the two appearances), Batman and Robin acknowledge his and Kato's status as heroes. In the later guest appearance, the episodes run with the standard "on police records a wanted criminal" plot device of the Green Hornet property, and entangle the Hornet/Kato and Batman/Robin in a Let's You and Him Fight standoff.
    • Later episodes would have Batman and Robin meet Colonel Klink from Hogan's Heroes or Lurch from The Addams Family in the window gag.
  • USA Network does this on a regular basis in their ads. If you take, say, "Monk: A Tribute" as canon, Monk, Psych, Royal Pains, Law & Order: Criminal Intent, In Plain Sight, and Burn Notice all take place in one universe. Sooner or later, all of their major series end up there.
  • Disney took this to an extreme, theming two entire episodes specifically for the crossover: That's So Suite Life of Hannah Montana and Wizards On Deck with Hannah Montana. They've taken it to an even further extreme and its most logical conclusion with practically every show on the network now existing in the Disney Channel Live-Action Universe through a series of tie-ins or direct crossovers.
  • CSI-verse:
    • The Mythbusters appear in an episode of the original CSI (Vegas). From the way the segment is filmed its unclear whether they are intended to be fictional lab-techs, "themselves" visiting the lab, or a figment of Nick's imagination. However they later tested the same theory on Mythbusters, using clips from the CSI episode.
    • CSI once shares a rather odd crossover with the sitcom (and fellow CBS hit series) Two and a Half Men: they swapped writers. The "Men" team wrote a CSI ep called "Two and a Half Deaths" about a murder on the set of a sit-com in which a rubber chicken is used as a murder weapon. Meanwhile the "CSI" team wrote one for them called "Fish in a Drawer" parodying the CSI process when a body is found in Charlie's bed.
    • The franchise also crossed over with Cold Case and Without a Trace one time each (NY and Vegas respectively). Some consider those two plus the CSI series to be one big 'verse.
  • Fringe has a particularly interesting example of this trope. The Observer, or rather one of them, specifically September, whose task it is to police inter-dimensional travel and interferences with the timeline, has managed to crossover from the Fringe continuity... into the "real world". He appeared in the audience of American Idol and has been spotted in various stadiums during Fox sports broadcasts. It's unclear whether the fact that Fringe Division's job used to be called the "X-Designation" is this or a Shout-Out.
  • In an episode of The Jack Benny Program, Jack goes to court for supposedly murdering a rooster he owns. Who does he get as his lawyer? Perry Mason. Although it may not count officially, since it was All Just a Dream on Jack's part. Oh, and the true murderer? Perry Mason himself.
  • An episode of Warehouse 13 included Douglas Fargo of Eureka. An episode of Eureka included Claudia Donovan from Warehouse 13. This is an example of a Shared Universe, as both shows (as well as Alphas) are part of the "Syfy Verse".
  • R. Lee Ermey turned up in Season 1 Episode 4 of Pawn Stars in full Lock n' Load gear.
  • Ally McBeal and The Practice had a two-part crossover special that started on Ally McBeal on Fox and was resolved in the next hour on The Practice on ABC, with several characters from each show appearing on the other show. Both shows were produced by David E. Kelley.
  • Susan's niece was missing when her sister Chloe overdosed, and was found by the police in New York.
  • Comic Relief frequently features entirely non-canonical intercontinuity crossovers. Notable ones include:
    • 1997's Prime Cracker, in which Fitz and DCI Tennyson hook up and decide that now they have a relationship they don't care who the killer is.
    • 1997 also had BallykissDibley, in which Geraldine desperately tried to convince a visiting Father Peter that her parishioners were normal.
    • 2009's When Janet Met Michelle, which combined all BBC Three's sitcoms about twentysomethings, as the cast of Two Pints of Lager and a Packet of Crisps invited characters from Grownups and Coming of Age to their fundraiser party. The title refers to the characters played by Sheridan Smith in Two Pints and Grownups, who did indeed meet.
    • One between The Catherine Tate Show and Doctor Who (with a bit of Recursive Canon).
    • In 2013, a skit with the 1950s midwives from Call the Midwife inexplicably in a modern maternity ward got even more bizarre when the increasingly exasperated father called for a doctor, and the TARDIS materialised.
  • Similarly, 2010's Children in Need telethon included East Street, in which a bunch of characters from each soap arrive at the location of the other one, including Gail Platt and Denise Johnson competing to see who has the most tragic backstory. The cliffhanger ending was that Liz Macdonald is Kat Moon's mother, in a direct parody of the revelation that Kat is Zoe's mother. See also the Doctor Who entry above for an earlier Children in Need 'Stenders crossover.
  • Bryan Fuller likes to do this. Marianne Marie Beetle was a tenant of Jaye's trailer park in Wonderfalls, and then showed up at a competition in Pushing Daisies, despite the fact that Jaye's brother in Wonderfalls plays the main character, Ned, in Pushing Daisies, so they exist in the same universe, technically. And Jaye's mother is also Mother Superior in the second season of Pushing Daisies.
    • And Ned mentions the Happy Time Temp Agency by name, so Pushing Daisies and Dead Like Me exist in the same universe as Wonderfalls, which makes the Celebrity Paradox even more fun, because Jewel Staite plays a to-be-reaped record store employee in Dead Like Me, and then later played Jay's boyfriend's ex-wife in Wonderfalls.
    • Now Hannibal is part of the continuity. Gretchen Speck (she dropped the Horowitz in the divorce, apparently), from Wonderfalls, is in Hannibal, and played by the same actress. (And in Bryan Fuller fashion, Celebrity Paradox kicks in, because Caroline Dhavernas is in both.)
  • The Nick Verse includes several Dan Schneider productions like Zoey 101, iCarly, Victorious, Sam & Cat and Drake & Josh as the core of the Shared Universe. However:
    • It also includes Sketch Comedy shows All That and The Amanda Show.
    • It also includes Yo Gabba Gabba! which had crossovers with Big Time Rush and True Jackson, VP.
    • Carlton Banks from The Fresh Prince of Bel-Air shows up in an episode of Big Time Rush, which puts the entire Nick Verse into the St. Elsewhere "It Was All A Dream" continuity.
      • Actually, that character wasn't actually Carlton, as the character's named Captain McAllister. And, even then, there are continuity problems elsewhere. Drake Bell appeared as himself in an episode of Zoey 101, not Drake Parker, and Drake & Josh was shown to be a TV show in episodes of iCarly and Victorious, but characters from each later appeared on iCarly. Not only that, but Miranda Cosgrove appeared as herself in the Christmas special of Big Time Rush, pretty much signifying those aren't in that continuity.
  • Niecy and Hakeem from Moesha appeared together in an episode of Clueless after UPN picked up that series.
    • This became a trend when Niecy appeared on Girlfriends and Maya appeared on Moesha as the aunt of Dorian's stepsiblings.
      • The character Peaches from Girlfriends made an appearance on Eve (2003). Taking all the connecting shows into account, Brandy has masqueraded as no less than four people in the UPN-verse: Moesha, herself, Chardonnay (The Game (2006), spinoff of Girlfriends), and a mystery caller on Sabrina, the Teenage Witch (which crossed over with Clueless).
  • Angel: Illyria appeared in Fallen Angel: Reborn.
  • Blake's 7 featured a non-humanoid alien menace that in the end was never shown on-screen. Word of God says that they were the Daleks from Doctor Who, and were originally intended to be shown, opening up the possibility of more crossovers between the two that sadly never came to pass.
  • To celebrate German reunification in 1991, the popular West German cop show Tatort (Scene of the Crime) and its East German counterpart Polizeiruf 110 (Call the Police - 110) did a crossover Tatort episode in which the two shows' teams found themselves Working the Same Case.
  • Arrowverse:
    • After his show was canceled by NBC, Matt Ryan guest starred as John Constantine in Arrow Season 4, which not only takes place in a different canon, but also a different network. The CW intended the crossover to be a prelude to Constantine joining the Arrowverse, but rights issues prevented Constantine from appearing again until two years later, when he guest starred in Legends of Tomorrow Season 3; it wasn't until Season 4 that the creators found a way to integrate him as a cast member.
    • Supergirl, originally an unrelated show on CBS, had Grant Gustin crossing over as Barry Allen from the 2014 Flash show for its 18th episode. When the show was greenlit for a second season, CBS passed it over to its sister channel The CW because of budgetary reasons. Since then, the series has transitioned well to the Arrowverse, joining its annual Crisis Crossover.
    • The Elseworlds crossover event had John Wesley Shipp reprise his role as Barry Allen from the short-lived 1990 Flash series that aired on CBS.
    • Crisis on Infinite Earths is the biggest instance of this in the 'verse. Not only did it bring Black Lightning (2018) into the Arrowverse, it also featured many actors who had played, or were playing, characters from unrelated DC media. And, with the exception of the Titans (2018) and Doom Patrol (2019) whose archive footage were used instead, they actually did appear this one time to reprise their roles. These included the 1989-97 Batman films (courtesy of Robert Wuhl as Alexander Knox), the 1960s Batman series (Burt Ward as Dick Grayson), Smallville (Tom Welling and Erica Durance as Clark Kent and Lois Lane), Superman Returns (Brandon Routh as Clark Kent), Birds of Prey (Ashley Scott and Dina Meyer as Helena Wayne and Barbara Gordon), Lucifer (Tom Ellis as Lucifer Morningstar), and the DC Extended Universe (Ezra Miller as Barry Allen), in addition to the aforementioned 1990 Barry Allen. It also marked the debut of the would-be Justice Society of America from Stargirl, which started streaming on DC Universe several months after the crossover event.
    • Humorously subverted with the Legends of Tomorrow episode "Zari, Not Zari". The promos indicated that the episode would somehow cross the show over with Supernatural, which was ongoing on The CW at the time but had absolutely no connection with DC Comics whatsoever. Indeed, it didn't; the Legends merely visited the show's set in Vancouver (they even saw Baby!), in one of the most blatant Leaning on the Fourth Wall moments known to man.


    Professional Wrestling 
  • New Japan Pro-Wrestling has Jushin Liger, Tiger Mask, and Black Tiger, all of whom were manga and or anime characters before NJPW licensed their likenesses and created wrestlers out of them. It makes sense for Tiger Mask and Black Tiger, as the anime they originate from was about wrestling in the first place, but Jushin Liger was created for a Henshin series that takes place 20 Minutes into the Future about a holy warrior with the power of the liger (half-lion, half-tiger) who battles evil aliens bent on destroying the world. Makes sense.
  • A running gag in Mexican wrestling, though it's been seen elsewhere too. CMLL had the Thunder Cats as one of its trios, for instance.
  • When Hulk Hogan's first movie, No Holds Barred, hit theaters, the WWF thought it'd be a good idea to bring in the villain of the film, Zeus, to battle Hulk in a WWF ring. They were never really clear on whether this was supposed to be the movie character come to life, or the actor assuming the character's persona to wreak havoc (in some promos, he'd lean one way, in others, the other), but one thing was absolutely clear throughout the entire angle: it was WrestleCrap.
  • RoboCop (yes, RoboCop!) appeared at WCW's Capital Combat 1990 to rescue Sting from a cage he was placed in by The Four Horsemen.
  • Chucky (the Creepy Doll from Child's Play) interrupted a Rick Steiner promo. Sadly, he didn't take up Rick's challenge to meet him in the ring.
  • In 2011, Ice Ribbon came under attack from Kaori Hoshi and Big Devil from the television drama Muscle Girls during the first anniversary of one of their own shows, 19 O'Clock.
  • Jimi Mayhem, who has a Shogun Of Harlem, gimmick, actually interrupted a showing of The Last Dragon, which is where his gimmick comes from, in New York. From there, Vendetta Pro would actually host a contest between "Shonuff" and Bruce Leroy, the actual Bruce Leroy (who in fact wasn't making his pro wrestling debut, as he had previously served as Jimmy Wang's manager in Ring of Honor)

    Tabletop Games 
  • Spelljammer fan campaign: Second Unhuman War as an extension of the Blood War — that is, between Elves corrupted and manipulated by Tanar'ri and Scro corrupted (if they need more) and manipulated by Baatezu.
  • Die, Vecna, Die was an intercontinuity adventure module, intertwining events in Greyhawk, Ravenloft, and Planescape.
    • Planescape, along with Spelljammer, had partly come to be to facilitate crossovers by connecting the various campaign settings — or, to put it another way, to render Die, Vecna, Die style campaign-setting crossovers into ordinary crossovers. On the other hand, Ravenloft was supposed to have a rather one-way connection to the rest of the multiverse (things could enter, but they couldn't leave), so something coming out of Ravenloft to have a crossover was rather unexpected...
  • Paranoia had one of these with Cyberpunk in 1989 with the adventure Alice Through the Mirrorshades. In true Paranoia fashion, every aspect of Cyberpunk was given a thorough mocking, from its gritty near-future setting to its "style over substance" ethos to creator Mike Pondsmith himself.
  • Phil Masters's Mage: The Ascension setting Mage 2069: No Strings Attached, in which the Traditions destroyed The Computer and took control of the internet in 2025, and the Technocracy responded by downplaying the very idea of computers from the Consensus. By 2069 the Technocracy has won ... only the Void Engineers are still finding Umbrood in near space and the oceans. And the remains of the Sons of Ether keep creating mega-projects that Go Horribly Wrong, requiring an international rescue team of Iteration X agents to sort things out. And then there turns out to be something completely inimical to the Consensus on Mars. So the NWO - having long almost entirely abandoned the M.I.B. look - send their brightly-uniformed agents from a flying base to investigate. Astral Is Green...
  • On a not-very-similar note, Pyramid magazine once described a Mage: The Ascension scenario where a bunch of mages start using vulgar magic in the wake of a space station exploding, the Technocracy leaps on the "scientific" explanation secretly fed to them by the Traditions without noticing it opens cracks in the Consensus that would allow Sleepers to start manifesting "superpowers", and the next thing anyone knows, it's the Aberrant universe.
  • Inferno - Dante's guide to Hell is Dante's Inferno as a Dungeons & Dragons 5E setting.
  • In Sentinels of the Multiverse NightMist, AKA Faye Diamond, is the granddaughter of Joe Diamond, one of the characters in Arkham Horror. One of Arkham's creators designed both NightMist and her nemesis, Gloomweaver.

    Theme Parks 

  • Matt Trakker of M.A.S.K. re-emerged as an action figure in the G.I. Joe line, presumably because Kenner (M.A.S.K.'s manufacturer) merged with Hasbro (G.I. Joe's manufacturer) years ago.
    • SQUUEEEEEEEEEE-- Oh, excuse me!
    • G.I.Joe's original intercontinuity crossover character, WWF wrestler Sgt. Slaughter.
    • Hasbro has also done G.I. Joe action figures for Rocky Balboa and William "The Refrigerator" Perry as team trainers. The Rocky figure was canceled, however, when another company picked up the toy license for Rambo before Hasbro could finalize the likeness rights for Sylvester Stallone.
    • And also G.I. Joe action figures for Street Fighter II. In fact, it was there when Ken got his last name, Masters, because they couldn't name an action figure just "Ken" thanks to Barbie.
    • G.I. Joe and Transformers cross over in an unreleased Transformers: Generation 2 era transforming G.I. Joe Armored Personnel Carrier, an unreleased Baroness & Ravage statue, and the G.I. Joe and the Transformers San Diego Comic-Con and Collector's Club exclusives, including the reappearance of Old Snake. The Transformers: Generations Combiner Wars Decepticon Viper transforms into a Cobra Rattler jet and has a combined Cobra/Decepticon insignia.
    • In Action Force #17, "Meditations in Red", Marvel hero and occasional Avenger Shang-Chi is revealed to have trained Quick Kick of Action Force, Lee Ho Ito, a different character than MacArthur S. Ito, Quick Kick of G.I. Joe. Action Force and Transformers UK cross over in "Ancient Relics!", and archaeologist Susan Hoffman appears in two later Transformers UK stories.
  • For a few years, Hasbro had a Transformers sub-line called Transformers Crossovers, including Star Wars and Marvel Comics characters. They are presented as the characters driving vehicles that transform into Humongous Mecha that look like they do, ranging from a Hulkbot turning into a tank to a moon-sized Darth Vader robot transforming to the Death Star. The Star Wars ones have an advantage in that they can use existing vehicles to turn into. The Marvel ones don't have existing vehicles (for the most part... but then again, try remembering the last time you saw Spider-Man's Spider-Mobile), but this is an advantage in its own way as they can be designed almost entirely around making the robot mode look right.
    • Before even those toys came along there was the Animorphs Transformers line, which unfortunately didn't do well, mainly due to Kibbles and Bits hitting the line hard; it also was tying in with the equally bad TV series at the time.
    • There's also the Disney Label ones, including "Mickey Prime" and a Bumblebee Donald Duck. Doesn't seem like these Disney crossovers will be coming to the US, though.
  • Teenage Mutant Ninja Turtles have had the Turtles as Troll dolls, Universal Studios monsters, and Starfleet officers from Star Trek: The Original Series (the latter due to Playmates holding both franchise licenses).
  • Sanrio once did a crossover with Care Bears in early 2014 in Japan called "Little Twin Stars X Care Bears". Complete with its own exhibit and exclusive Care Bears and Little Twin Stars merchandise.

    Video Games 

    Web Animation 


    Web Original 
    Web Videos 

    Western Animation 


Alternative Title(s): Intercompany Crossover


Peter Parkers

The Peter Parkers from two different Spider-Man movies meet in a whole different Spider-Man movie.

How well does it match the trope?

5 (14 votes)

Example of:

Main / AlternateSelf

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