Continuity: In the scene where Leela is telling Fry how even his food is recycled (just after they have seen the video of the origin of the garbage-ball) you can see both Fry's drink can and sandwich on the table. After the closeup of Fry his sandwich has disappeared but in the next full-table shot it's back (albeit moved to Fry's right along with his drink can).

Continuity: When the team first meet the Mayor, the writing on the Mayor's nameplate disappears after it is first seen, and the button on his desk that he pushes wasn't there before.

Continuity: Most of the objects on the Mayor's desk disappear (e.g. the photograph, the lamp) when Professor Farnsworth starts to write his plan on it.

Continuity: The dagger and sheath on the boot of Leela's space boot only appears when she needed to cut off the elastic caught around his neck, and then disappears directly afterward.

Continuity: When the Death Clock is put on the table, the readout panel is facing away from the edge of the table. In the next shot, it is facing Leela and the edge of the table.

Plot hole: In this episode the mayor says that New New York has been garbage free for 500 years, but in most other episodes there's been tons of it lying around on the streets.

Continuity: The FunkOMeter doesn't appear on the telescope until Professor Farnsworth points it out, and it disappears again afterwards.

Continuity: When Bender is ordering from the wine list, the waiter's notepad changes colour from yellow to white.

Other: When Professor Farnsworth was presenting the crude drawing of the Smelloscope to his scientific peers, he wiped the napkin which it was drawn on on his forehead, causing all the ink to smudge. But why isn't there any ink on Professor Farnsworth's head?