The escape from the mothership scene is recreated.
Fry reveals that he's been trying to learn the holophoner since we first saw him play one in this episode.
Leela reads a book about courageous animals.
Greasy Sue's Greasy Truck Stop makes an appearance.
Is featured on a TV screen in the opening sequence.
The Planet Express crew's journey through Fry's bloodstream and digestive tract echoes the plot of the earlier movie