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VOICE OVER: Phoebe de Jeu WRITTEN BY: Matt Demers
Just like oil and water, the worst TV crossovers just didn't mix. For this list, we'll be looking at instances where different television universes came together, only to deliver strange, disappointing, or in many cases, head scratching results. Our countdown includes "Baywatch," "Roseanne," "The Simpsons," and more!
Script written by Matt Demers

Top 10 Worst TV Crossovers

Just like oil and water, there are some things that don’t mix. Welcome to WatchMojo and today we’ll be counting down our picks for the Top 10 Worst TV Show Crossovers.

For this list, we’ll be looking at instances where different television universes came together, only to deliver strange, disappointing, or in many cases, head scratching results. Now, let’s cross the streams!

#10: Super-Sized Power Rangers Team-Up
"Power Rangers: Super Megaforce" (2013-14) / “Power Rangers” franchise (1993-)

What should have been the ultimate love letter to the Power Rangers franchise, instead became the ultimate disappointment to fans everywhere. Celebrating the Rangers’ 20-year anniversary, a legendary reunion was primed to take place on Power Rangers: Super Megaforce. The potential for greatness came from the much-anticipated final battle with Emperor Mavro and his XBorgs that would see the return of every past Power Ranger… EVER! However, despite its nearly 2 year build up, the mega mêlée turned into a 2-minute letdown. Making matters worse, various errors were clearly visible, including voices being synched with the wrong characters. Maybe they’ll get it right at the 40-year mark?

#9: Baywatch Meets the WCW?
“Baywatch” (1991-2001) / World Championship Wrestling (1988-2001)

How do you make a mid '90s lifeguard melodrama even more campy? Easy: just insert some professional wrestlers. Here, legends of the squared circle, Hulk Hogan and “Macho Man” Randy Savage, joined up with the Baywatch folks to save a local youth center. How exactly? By challenging the building’s new owners to a battle for supremacy of course! It should be noted that the evil developers are fellow wrestlers “Nature Boy” Ric Flair, Kevin Sullivan, and Big Van Vader. And while the marquee matches were actually taped at a WCW beachside pay-per-view event, the episode didn’t air until nearly a year later, at which point Vader had left the company and was working with the competition. Talk about a losing promotional effort!

#8: Rosanne’s Absolutely Fabulous Daydream
“Roseanne” (1988-2018) / “Absolutely Fabulous” (1992-2012)

When the Connors kicked off Roseanne’s ninth season by winning the lottery, ending their blue-collar existence, it was the catalyst for a series of strange episodes that followed. One such peculiar outing featured the heavy partying duo from popular British sitcom Absolutely Fabulous. And while Roseanne and Jackie drinking with Patsy and Edina at a ritzy social soiree was sort of fun, things concluded on a rather odd note when the episode’s events were revealed to have been a dream. Which begs the question – do Edina and Patsy really exist in Roseanne's world, or does the daydream null all that? Just another of life’s mysteries…

#7: CBS’ Shameless Crossovers
“Cosby” (1996-2000) / “Becker” (1998-2004) / “Everybody Loves Raymond” (1996-2005) / “The King of Queens” (1998-2007)

CBS’s marketing team clearly felt honesty was the best policy when they billed a crossover event in the late 90’s as “Shameless Crossover Monday.” Unfortunately, sly advertising wasn’t enough to make sense of the multi-show publicity stunt. You see, throughout the night, the stars of “Cosby”, “King of Queens”, and “Everybody Loves Raymond” found themselves getting injured. This led Becker, in the final episode of the night, to find Hilton, Doug, and Ray in his waiting room. It’s a bit of a stretch that all these characters share the same doctor though, given they each live in completely different boroughs of New York. CBS didn’t seem to initially mind, as they later did a follow-up special titled, you guessed it, “Even More Shameless Crossover Monday!” - though the cameos were later removed from the syndication and DVD edits.

#6: Brand Integration Gone Wrong: Jessie Meets Spidey
“Jessie” (2011-15) / “Ultimate Spider-Man” (2012-17)

Being a Halloween special isn’t a solid excuse to house a crossover between two shows with little to nothing in common. And yet, that’s exactly what happened with “Ultimate Spider-Man's” “Halloween Night at the Museum” episode. It’s here that we see ‘ol Spidey team up with the cast of Disney Channel’s comedy series “Jessie”. With the episode starting off live-action and turning animated, Jessie finds herself in trouble with the villainous Morgan le Fay and needs Spider-Man’s help to save the day! Sure, that makes sense – except of course for the canon implications, continuity consequences, and, oh yes, overall logic!

#5: Mexican Standoff Between a Bat, a Hornet, a Robin & a Valet
“Batman” (1966-68) / “The Green Hornet” (1966-67)

In season two, Batman and Robin come face-to-face with the Green Hornet and Kato as the crimefighters set out to bring down an illegal stamp ring. Instead of teaming up, the Caped Crusaders view the out-of-towners as criminals, which is quite the departure from their friendlier encounter during a window cameo in an earlier episode. After busting Colonel Gumm and his cronies, the four men proceed to duke it out against each other. What is perhaps the most ridiculous of all is the sidekick showdown in which Robin, played by Burt Ward, actually got some licks in against Kato, played by Bruce Lee! Not only is that unbelievable, but it also ends up being the cops who bring the whole thing to a halt.

#4: Bart Simpson Pranks Jack Bauer
“The Simpsons” (1989-) / “24” (2001-14)

The Simpsons apparently weren’t content with just spoofing fellow FOX program “24”, they wanted its star hero to join the shenanigans. And sure enough, while in the midst of helping prevent the release of a stink bomb, Bart's phone conversation is accidentally crossed with a call from Jack Bauer himself. Stuck in an ensuing gun battle, Bauer becomes the victim of a questionable prank call from our favorite spiky haired troublemaker. It lasted all of 30 seconds however, and while Jack would show up again in the episode’s final moments, it meant nothing to the overall story. Well at least they got Kiefer Sutherland to mutter his unofficial catchphrase (damnit)!

#3. Teen Titans Meet Powerpuff Girls
“Teen Titans Go!” (2014-) / “The Powerpuff Girls” (1998-2015)

Fans of the Cartoon Network’s popular “Teen Titans” series were none too pleased when their beloved show was canceled and subsequently replaced with the aggressively juvenile “Teen Titans Go!” Those same viewers were likely getting in some serious eye rolling when it was announced that this new Titans iteration would be crossing paths with the Powerpuff Girls. And meet they did, when the two teams were brought together by the troublemaker Mojo Jojo, who had taken up residence in Jump City. Like most superhero team encounters, there was initial friction between the groups, but they managed to settle their differences in time to take out the bad guy. Harmless? Yes. Unnecessary? Very.

#2. The Seinfeld Extended Universe?
“Seinfeld” (1989 –98) / “Mad About You” (1992-99)

Considered by many to be the greatest sitcom in the history of television, Seinfeld is fondly remembered for an abundance of celebrated moments, quotes and characters. However, one thing that seems to be forgotten, and perhaps for good reason, is the show’s connection to another NBC comedy series. It was revealed on an episode of Mad About You that Paul Reiser’s character was still subletting his old bachelor apartment. And so, when he goes to settle the lease with the tenant, it is revealed to be none other than Cosmo Kramer. Yep – THAT Kramer. Serenity now Seinfeld fans - serenity now!

Before we unveil our top pick, here are a few honorable mentions.

The Fresh Prince’s Cousin Dates Blossom’s Brother
“Blossom” (1990-95) / “The Fresh Prince of Bel-Air” (1990-96)

Larry Says “Hello” on “Diff’rent Strokes”
“Hello Larry” (1979-80) / “Diff’rent Strokes” (1978-86)

Dr. Bombay Makes a Housecall on “Passions”
“Passions” (1999-2008) / “Bewitched” (1964-72)

The Critic Visits Springfield
“The Simpsons” (1989-) / “The Critic” (1994-95)

#1: Seeley Booth’s Visions of Stewie Griffin
“Bones” (2005-17) / “Family Guy” (1999-)

It’s rather fitting that television’s most bewildering crossover is the result of a hallucination, seeing how many viewers probably thought they were having one of their own when it all went down. Transpiring on an episode of the Fox dramedy “Bones”, FBI Special Agent Seeley Booth conjures up interactions with Stewie Griffin – you know, the blunt baby genius from “Family Guy”. Booth’s delusions include Stewie steering him away from the idea of fathering a baby. The visions are later explained to be the result of a brain tumor, and Lois and Peter’s baby boy was never seen or mentioned again. It’s almost as if they wanted us to forget it ever happened in the first place. Not a bad idea!