Continuity mistake: When the clone comes to examine his crew we see Leela being lowered on a platform to the ground. When it cuts to a close-up of the clone the platform, which should be behind him, is gone. (00:08:30)
Continuity mistake: Leela's shirt gets fixed when she picks up Nibbler after they defeat the Chupeneabrea. (00:25:45)
Continuity mistake: When Bender laments that he'll be drifting through space with just a little swag, he takes a gold wristwatch out of the bag and puts it on. The watch disappears a few seconds later when he pulls the little piano out of his chest storage and is never seen again.
A Big Piece of Garbage - S1-E8
Continuity mistake: The FunkOMeter doesn't appear on the telescope until Professor Farnsworth points it out, and it disappears again afterwards. (00:07:15)
Continuity mistake: When it cuts to the bar and Leela is watching Amy dancing with a guy, Amy is resting her head against the man's left shoulder. When it cuts she is resting her head on his right shoulder. (00:10:15)
Continuity mistake: When we see Nibbler sitting on the floor with all the unwrapped papers around him, a purple box is lying on some blue paper right in front of him. When it cuts the box is grey and the paper is green. (00:03:20)
Continuity mistake: Right at the end, Bender is smoking a cigar and says something like "Emotions should be hated." In the very next shot when he has stood up, the cigar has vanished from his hand and there isn't anywhere he would have put it down.
Anthology of Interest 2 - S4-E3
Continuity mistake: When Fry reads from the book to scare the crow away, the book is suddenly closed in the next shot when Leela start talking. (00:16:30)
Fry and the Slurm Factory - S2-E4
Continuity mistake: During the Slurm Queen chase scene, the Slurm girls' shoes appear and disappear several times. On Slurms MacKenzie's line "Stop right there." the girls are wearing high-heeled pumps. When the shot cuts back to them, they're barefoot. A few seconds later, when the Slurm Queen bursts in, the Slurm girls are wearing shoes again; in the ensuing pursuit, their bare feet can be seen. At the end of the scene, when Slurms says, "I'll hold her off," the girls are wearing shoes. The girls are back to barefoot when Slurms tells them to party on without him. (00:18:55)
Teenage Mutant Leela's Hurdles - S5-E7
Continuity mistake: When the door is closed on the "ageing chamber," notice that the side the hinges are on changes between the external and internal shots.
Continuity mistake: The amount of canisters Leela has opened at the end is constantly changing.
My Problem With Popplers (a.k.a. The Problem With Popplers) - S2-E18
Continuity mistake: When Bender tries to force feed Leela with Popplers he pours half the bucket with Popplers over Leela. When Leela throws the bucket in the garbage can, the bucket is full. (00:06:50)
Continuity mistake: On board the Nimbus where Zapp asks for the activation codes for the global defense network, it immediately after cuts to a shot of Kif Saying "Aye Aye sir". In the background of the shot sit two ship crew members, the brown haired one on the left disappears in the following shot. (00:13:50)
Continuity mistake: When Bender's cans first fall onto the floor, they don't have labels on them, but in the next shot they do. (00:05:00)
Love's Labors Lost in Space - S1-E4
Continuity mistake: In the beginning, when Leela is on a date with the guy she says, "This restaurant is a great choice," and their glasses are on the table. When it cuts two plates suddenly appear as well. (00:00:05)
Continuity mistake: When we see the professor's clone inside the tube there is a panel attached to a metal post going down to the bottom of the tube. When the professor hits the button to empty the tube of fluid it cuts to a close-up of the clone's feet and the metal post is suddenly gone. (00:08:05)
My Problem With Popplers (a.k.a. The Problem With Popplers) - S2-E18
Continuity mistake: During the professor's toast we see in an overhead shot there are two plates with veal on them and one plate with a pork on it. When Leela tells them to pass the veal to her all three plates have veal on them. (00:20:30)
How Hermes Requisitioned His Groove Back - S2-E14
Continuity mistake: When Morgan shows up at Fry's apartment he rips the blanket off the bed with his right hand. When it cuts the blanket is in his left hand. (00:10:45)
Continuity mistake: When Leela turns on the TV we see Bender standing on top of the globe. He stands on dry land with nothing but the ocean surrounding him. When it cuts extra land and islands in the ocean appears. (00:14:00)
Time Keeps on Slipping - S3-E14
Continuity mistake: After the end of the basketball game, Leela's tights briefly disappear. (00:07:35)
Answer: You are thinking about episode 20 of series 2 - "Anthology of Interest I". She technically never kills anyone, but in the episode she ask a "What if machine" (one of the Professor's inventions) what would happen if she was more impulsive. The machine then shows the more impulsive Leela killing off the Professor to get the money from his will and thereafter killing Hermes, Bender, Scruffy, Cubert, Nibler, Amy and Zoidberg to cover it up. Finally she does something really impulsive with Fry.
Andreas[DK]