Futurama

Futurama is an animated science-fiction comedy show, that was also created by Matt Groening. Numerous references have been made to the show throughout the run of The Simpsons as well as Futurama making references to The Simpsons. Many people have compared the Futurama main characters with the main Simpsons characters such as Bender is Futurama's Homer.

A running joke is that on The Simpsons, Futurama is a fictional cartoon show on Futurama, however, it is The Simpsons that is a fictional cartoon show.

Futurama in The Simpsons

 * "Treehouse of Horror IX": David X. Cohen's pseudnoymn is David "Watch Futurama" Cohen.
 * "Mayored to the Mob": Uter wears a Futurama T-shirt at the "Bi-Mon-Sci-Fi-Con". This episode aired three months before Futurama started.
 * "Missionary: Impossible": Bender appears in FOX telethon.
 * "HOMЯ": In the couch gag, The Simpsons come out from tubes, like in Futurama, and a yellow Fry comes from one of them.
 * "Bart vs. Lisa vs. The Third Grade": Bender is one of the TV characters Bart hallucinates and sees the kids turns into.
 * "Helter Shelter": a model of the can be seen in Comic Book Guy's shelf.
 * "I, D'oh-Bot": Bender's name appears on a videotape fighting Killhammad Aieee.
 * "My Big Fat Geek Wedding": Matt Groening appears as himself at the Comic Book convention, billed as the creator of Futurama.
 * "Fraudcast News": Squeaky Voiced Teen yells: "Why did they have to cancel Futurama?!" before jumping off a mountain.
 * "Catch 'em If You Can": In the video store, there's a poster for Futurama in the background
 * "Future-Drama": Bender appears when Homer and Bart pass through the tunnel; John DiMaggio guest stars as the voice of Bender. The episode's title is a reference to Futurama as well.
 * "Homerazzi": Sideshow Mel eats the American Flag just as Dr. Zoidberg did in "A Taste of Freedom".
 * "That 90's Show": Homer says that Matt Groening created Futurama at the time.
 * "Helter Shelter": One of the figurines sitting on Comic Book Guy's shelf is a model of the Planet Express Ship.
 * "Treehouse of Horror XIX": Bart, when looking for a present for Lisa, picks up a bottle with a crude picture of Fry being hanged on the side of it.
 * "Bart Simpsons comics": in an issue, Bart has taken over Comic Book Guy's stall, the comic convention suddenly opens thousands of kids come rush at Bart asking him to trade their comics with him (since the stall was a kinda Comic trade center). One of them being a kid who wants to trade his Futurama comic which his cat "peed on".
 * "The Simpsons Road Rage": in this video game, Leela and Bender are among the public in Kang and Kodos spaceship.
 * "The Simpsons Game": in this video game, Bender and Zoidberg appear as enemies in the level "Five Characters in Search of an Author".

The Simpsons in Futurama
In return, there have been a few references to The Simpsons on Futurama.
 * "Space Pilot 3000": when Fry passes through an underwater tube, Blinky briefly appears in the water below him. Also, in an early storyboard of this episode, Fry is watching The Simpsons.
 * "My Three Suns": one of Bender's badges at the bottom of his sash has a profile of Homer.
 * "A Big Piece of Garbage": on the trash asteroid, a pile of Bart Simpson dolls can be seen. Bender picks up one and hears Bart say his catchprase, "Eat my shorts". Bender complies and eat them and mimics Homer in saying "Mmm... shorts". Nancy Cartwright voiced the Bart Simpson doll.
 * "Hell Is Other Robots": when Fry and Leela open the door to the Robot Hell, a heart with an arrow through reads "H.S. 4 M.B.". This means "Homer Simpson for Marge Bouvier" (later Simpson).
 * "Mars University": Homer and Bart toys appear as prizes at the "Coney Island College".
 * "Fry and the Slurm Factory": Bart, Lisa, and Maggie appear in the opening sequence on the TV screen in one of the Tracey Ullman Shorts.
 * "Why Must I Be a Crustacean in Love?": the opening subtitle is "From the network that brought you 'The Simpsons'."
 * "Anthology of Interest II": the clothes Bender wears as a human resemble Homer's.
 * "Luck of the Fryish": Bart's head appears on the shelf.
 * "Leela's Homeworld": Bart's face appears in as part of the hot air balloon the main characters use to escape the sewers.
 * "Jurassic Bark": the hole of the miniature windmill is closed until further notice due to someone being inconsiderate and creating an unsanitary condition. This this is a reference to "Natural Born Kissers" in which Homer and Marge have sex at a minigolf windmill.
 * "Bender's Big Score": Apu and Manjula's heads appear in the head museum.
 * "The Beast with a Billion Backs": the end credits show the actor's name, together with an array of pictures of the characters they voiced. This is similar to The Simpsons Movie.
 * Dan Castellaneta and Hank Azaria were guest stars on the show as Robot Devil and Harold Zoid characters respectively. Tress MacNeille, Maurice LaMarche, and Frank Welker are recurring voice actors on both shows.
 * In reference to the longevity of the show, it was stated that in the year 3000 The Simpsons are still on the air and keep producing original episodes even over one thousand seasons.
 * "Hostile Makeover": The wig Amy puts on Leela about halfway through the comic is the same style as Marge's from the simpsons.