26 Reincarnation

An episode featuring Futurama animated in three retro styles: "Colorama" has Futurama as a black-and-white, rubber-hose cartoon from the 1930s, "Future Challenge 3000" has the show as an early 1990s low-resolution video game, and Action Delivery Force has the show as a 1980s Japanese cartoon.
Watch Futurama Season 6 episode 26 Reincarnation online for free