Doctor Who

Doctor Who is a long-running British sci-fi show. Matt Groening claims to be a fan of Doctor Who. Whenever the Doctor appears he is in his fourth incarnation, which is that of Tom Baker.

In Treehouse of Horror X, Comic Book Guy, aka The Collector, The Doctor concealed in plastic, along with many other geek-show characters. He introduces The Doctor as Doctor Who (the character's common nickname) to Bart Simpson, aka Stretch Dude and Lisa Simpson, aka Clobber Girl. The Doctor also makes an appearance as one of the representatives of TV in Sideshow Bob's Last Gleaming and in Bart the Fink. Comic Book Guy is seen walking out of a taco shop with a hundred tacos, stating that they'll give him sufficient energy during the Doctor Who marathon. Tom Baker appears in his Doctor costume in the episode Mayored to the Mob.

The Simpsons have also been referenced on Docotor Who. In the Doctor Who episode Planet of the Ood, one of the Ood's programming functions is 'classic comedy', the OO worker says "Ood, you've dropped something", and the Ood replies with "D'oh!"

Also, in the Doctor Who episode The End of Time: Part 2 while being pushed in the trolley the Doctor says "Worst. Rescue. Ever!" This is possibley a reference to Comic Books Guy's chasephrase, however this is probably just a similarity.