Continuity mistake: In the establishing shot of the science lab, Hermes' son is seen sitting next to a window made up of lots of panes. When he exclaims "My Manwich!", the window in the background is missing. (00:01:40)
Zapp Dingbat - S7-E5
Continuity mistake: When Turanga Munda walks down the aisle to marry Zapp Brannigan one of her tentacles changes color for a brief period. (00:16:00)
Continuity mistake: The hammer on Leela's blaster changes from smoothly curved to angular.
Continuity mistake: As Bender is stomping to stuff the whale down the sewer, when the rope gets to the pavement, the top where the cover is tied suddenly jumps from the level of Bender's head to below the spot where his legs and body meet.
Why Must I Be a Crustacean in Love - S2-E9
Continuity mistake: As Zoidberg looks around at the beach, he is suddenly up on his mound, and two females are suddenly in the scene without walking onto frame.
Xmas Story - S2-E8
Continuity mistake: While Fry is commenting on it being his first Christmas without his family, it can be seen that the door to the hallway is open. but when Hermes comes in, there's the sound of the door opening. Also, Hermes waves the two stacks of cards. The stack in his right hand has a red envelope in it that changes to white in the wide shot.
Xmas Story - S2-E8
Continuity mistake: When Bender starts serving the bird for everyone, you see a chair between Fry and Tinny Tim. In the closer shot, Bender is in between Fry and Tinny Tim where the chair should be.
Anthology of Interest 2 - S4-E3
Continuity mistake: In Leela's "What If" experience, the Cute Witch's wand suddenly goes from clutched in front by both hands to held out to the left side in a split second.
Continuity mistake: When Fry, Leela, and Bender make it back to the ship, Fry's hair is messed up. When the bee is unfolding itself, Fry shouts "Look out!" and his hair isn't messed up. Then when he says the bee will have to go through him, his hair is messed up again.
The Honking - S3-E1
Continuity mistake: At the end, the Were-car skids sideways and flips into the furnace. From the outside, it lands upside down in the furnace. A second later, it's right side up.
Leela and the Genestalk - S7-E22
Continuity mistake: When Leela's parents call Fry on her "wrist thingie", we see it has clamps on the back that go like "up down up down" but in the middle of the sequence they change to "up down down up". (00:12:50)
Saturday Morning Fun Pit - S7-E19
Continuity mistake: When the first Larry Bird clone is created, he is standing next to the cloning machine. When the rest of the clones are made, the first clone is no longer there. (00:05:15)
Saturday Morning Fun Pit - S7-E19
Continuity mistake: When the first Larry Bird clone finishes his line, one of his arms is raised. The next shot shows both arms are by his side. (00:05:15)
Saturday Morning Fun Pit - S7-E19
Continuity mistake: The five arrive at the theater. When Fry says "Search me, no don't. I'm carrying", there is no-one next to Fry on the left for a good foot and a half. In the next shot, Amy has appeared about a half foot next to him. (00:02:25)
Continuity mistake: When Fry is being emperor and Leela is questioning his actions, there is a water being with a yellow mouth cover. Later, there is a pink mouth cover on that being.
Love's Labors Lost in Space - S1-E4
Continuity mistake: In the scene around the table, Leela is holding a lilac coloured cup. This changes to a red coloured cup later in the scene. (00:04:05 - 00:05:10)
Continuity mistake: Early in the swim to the ocean, salmon Scruffy is eaten by Zoidberg. Later, during the the swim back to the stream, Scruffy is seen with the group, just behind Leela and Fry.
Continuity mistake: When Fry and the kid are racing along the motorway, just after they let go of the cars they are holding onto, they head into a lamp post. This leads them to banging their heads and collapsing on the floor, because the ribbon they were holding onto forces them into the lamp post. When they fall on the floor, the dust shoots up. After the dust disappears, the lamp post has as well, meaning that the ribbon isn't actually tied around anything.
Continuity mistake: When Bender enters the officer's bar, he has two medals on his chest. In the last shot of him they have both disappeared.
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]