Continuity mistake: When Bender lies on the roulette the numbers keep changing between the shots. For example when Bender's antenna lands on the number "21", the number beside it is "25". When it cuts the number "25" has suddenly changed to "4" (00:07:50)
My Problem With Popplers (a.k.a. The Problem With Popplers) - S2-E18
Continuity mistake: When Branningan asks what they demand, Lrr is sitting at the table with both hands on the table. When it cuts to a close-up of him only one hand is one the table. (00:12:00)
Continuity mistake: When Bender get axed in the back Leela says he can't give up every time he gets axed and drilled through his face, while having both her hands placed on the ring's floor. When it cuts her left hand is off the floor.
Put Your Head on My Shoulder - S2-E10
Continuity mistake: At Fry and Amy's date Fry has a bite from his burger, puts it on the plate and holds on to it. When it cuts his hand's off it. (00:15:55)
Bender Gets Made (a.k.a. Bendfellas) - S2-E17
Other mistake: At the end, when Fry, Leela and Bender are sitting at the table, Fry's legs disappear (and the gray blotch beneath him isn't them - it's the table leg; and it's not hiding them either - his knees should be visible behind it). (00:21:35)
Continuity mistake: When Fry and Leela are standing in the corridor with the portraits of the past Emperors, there are numerous errors. Including the picture of Fry vanishing, as well as blank frames appearing and figures facing the wrong direction. (00:11:50)
A Bicyclops Built for Two - S2-E13
Continuity mistake: When Fry wants to go in the forbidden part of the planet, he jumps over the fence and fell in a trap, which is in grass. When he returns later, it is now a road. (00:13:15 - 00:17:20)
My Problem With Popplers (a.k.a. The Problem With Popplers) - S2-E18
Continuity mistake: After the toast for Leela, we see Leela sitting with a plate right in front of her. When it cuts the plate is gone. (00:20:30)
My Problem With Popplers (a.k.a. The Problem With Popplers) - S2-E18
Continuity mistake: During dinner Fry asks Amy to pass him the pig and she pass it to him. When it cuts the plate with the pig has been replaced with a plate with veal. (00:20:35)
I, Roommate - S1-E3
Continuity mistake: When Leela is complaining to Fry and Bender about being inconsiderate, there is a container on the wall with folders in it. When the couch gets pushed out the door, it's disappeared. (00:03:55)
Continuity mistake: When Bender plays the recording of Nixon his body is sitting right behind him. As Leela takes the audio tape out of Bender's mouth his body is gone. (00:19:10)
Continuity mistake: Down in the sewer when Leela and Bender are calling for Nibbler, the patch on their boat changes position between the shots. (00:13:40)
Continuity mistake: When Bender takes the eggs out of the egg box he doesn't close the box. When it cuts the box is closed. (00:05:20)
Anthology of Interest I - S2-E20
Continuity mistake: When Hermes finds out Leela is the sole heir of the professor he puts his hand on the pile of paper. In the next shot his hand on the pile change position. (00:09:40)
Continuity mistake: During the Mother's Day commercial on TV, as Destructor hands over a card to Mom, the antenna on the TV suddenly changes color without the shot cutting. (00:01:00)
Continuity mistake: When Bender and Fry are in their cabin the cabin window change position between shots. (00:11:10)
Continuity mistake: Before Bender fight Destructor Leela reads from the script while holding it with both hands. When it cuts she holds the script with one hand and Bender's wand suddenly appears in her other hand. (00:15:45)
Three Hundred Big Boys - S5-E11
Continuity mistake: Right before Leela dives into the whale tank, she drops her snorkel and mask, but when the shot pulls back, they've completely disappeared.
Continuity mistake: When Fry and Bender are sleeping, the knob on Bender's chestplate appears out of nowhere. (00:11:20)
A Bicyclops Built for Two - S2-E13
Revealing mistake: At the end of the wooing near the end, you can see that Fry has four arms.
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]