Continuity mistake: The welfare cheque that Lois gets from the postal worker is addressed: 'Peter Griffin, 72 Spooner St, Quahog, RI' but the Griffins live at 31 Spooner St. every other time their address is mentioned. (00:14:26)
Continuity mistake: When Ulysses S. "Griffin" is chugging beer with Robert E. Lee, Ulysses wins. When he says "How's that Robert E. Lee," he puts the beer glass on his head. After Robert says, "Okay no more slaves, but we still don't have to read books," the glass is in Ulysses' hand. In the next shot it's on his head again. (00:10:05)
Chitty Chitty Death Bang - S1-E3
Continuity mistake: When Meg introduces Jennifer to Lois, she is, as usual, wearing her glasses. However, right when Jennifer says, "Bye Meg," Meg is seen in the shot, and her glasses have disappeared. Her glasses are back on in the next shot.
Continuity mistake: When Chris is saying "I'm not supposed to tell Mom cos she'll just bitch about it" there is a door behind Lois with a box next to it. In the next shot there is a smaller box next to that box which was not there before. (00:09:00)
Peter, Peter, Caviar Eater - S2-E1
Continuity mistake: In the scene where Lois goes down to the room where Peter is dancing, Peter is wearing blue pants. After he walks over to the door and greets her, he still has blue pants. The next shot of Lois and Peter dancing has him wearing his normal green pants, but after that it goes back to blue pants for the rest of the scene. (00:11:35)
Continuity mistake: After Lois accuses Stewie of peeing on the carpet, he asks her to bend down and slaps her with a glove. The glove remains in his hand in that cut, is still there when there is a wide shot of Peter, Stewie, Lois and Brian (you can just see it next to his trousers in his hand), but when it cuts back to Stewie and he starts on about "the outrages" etc, it is gone (the cut is instant, no time for him to put it back in his pocket). A common error, this one just struck me as strange, because the sandwich Stewie threw at Lois is there the entire scene. (00:03:35)
The Father, The Son, and The Holy Fonz - S4-E18
Continuity mistake: When Stewie is in the sterile glass cage, Lois is changing his diaper with rubber gloves built into one of the panels (like Homer Simpson's in the opening credits). In previous and subsequent shots, however, the panel is solid glass, with no gloves. (Series 4: The Father, The Son, and The Holy Fonz).
Continuity mistake: When Tom Tucker is reporting about Peter saving Horace, his angle in relation to the bar changes. (00:19:00)
I Never Met the Dead Man - S1-E2
Continuity mistake: The family visits Peter in the hospital. In the long shot, there is nothing on Stewie's head. In the next close up, a band-aid appears on his head. (00:20:30)
I Never Met the Dead Man - S1-E2
Continuity mistake: After Meg is pulled over by the police officer, in the situating shot of Peter driving Meg home, it appears that Lois is sitting next to him in the passenger seat, but it's really Meg. (00:05:30)
Continuity mistake: When Karen Black is first shown, her blue uniform is sleeveless, showing her white shirtsleeves. After a cut to the "Dawson's Creek" kids, Peter says "It was a movie in the seventies," and Black's outfit has sleeves. Later, when she is helping people off the plane, her uniform once again is sleeveless.
Breaking Out Is Hard to Do - S4-E9
Continuity mistake: When the Griffins are discovered by Joe, Peter switches from his Sumo outfit to his regular outfit in a matter of seconds.
Mr. Griffin Goes to Washington - S3-E3
Continuity mistake: In the scene where Peter is at the baseball game, Stewie is sitting next to a boy he calls "Opie." The camera then cuts away to a clip. When the camera cuts back, "Opie" is gone and a grown man is now sitting next to Stewie. (00:02:55)
Continuity mistake: When Meg is putting down traps for Joe, she puts down a lot. Then when the Griffens leave and the giant rat comes, there are only a few. Then when Joe says "bring it on," there are a lot again. (00:11:00)
Continuity mistake: When Peter is talking about how annoying it is to be locked up in the house, Brian disappears from the couch in quite a few shots. (00:07:50)
Stuck Together, Torn Apart - S3-E19
Continuity mistake: In this episode, Mort Goldman shows Peter a dating video he made, saying it's how he and his wife met. He is an adult in the video, yet in an earlier episode 'The Kiss Seen Round The World', Mort's wife tells the Griffins that she met him when they were just 14.
Continuity mistake: When Peter is on the phone talking to Death the color of the napkin on the table changes from red to a brownish color.
Continuity mistake: When Death is talking about how he wanted to be a wood nymph, he has no pillows, but in the next shot, he has a blue pillow.
The Courtship of Stewie's Father - S4-E16
Continuity mistake: When the baseball crashes through Herbert's window, the glass shards are in different places in different shots. (00:04:05)
Peter, Peter, Caviar Eater - S2-E1
Continuity mistake: In the scene where the Griffins are at the yacht club, Peter is telling a rat story. Before he talks about a steak, Lois' earrings are white, but right after they suddenly change to blue. (00:09:10)
