Continuity mistake: When Peter walks away from Brian with the hula hoop around his waist, he runs into the stereo, knocking a vase of flowers on the floor, shattering the vase. Next shot shows the mess cleaned up without anyone even cleaning it. (00:04:45)
A Picture Is Worth 1,000 Bucks - S2-E11
Revealing mistake: When the hotel employee gives Peter the key to the room, the man's moustache turns yellow for a second.
Brian: Portrait of a Dog - S1-E7
Continuity mistake: Brian's black collar briefly turns back to his red one when he's looking at the bird combust. (00:05:56)
Revealing mistake: Peter's right eye overlaps his nose when Lois reminds him about getting drunk off communion wine at church. This mistake was later referenced in "Back to the Pilot." (00:02:50)
Something, Something, Something, Dark Side - S8-E20
Continuity mistake: When escaping Hoth, in the Falcon are Han, Leia and Chewbacca. But when the Falcon takes off, C-3PO appears out of nowhere. (00:18:55)
Road to the North Pole - S9-E7
Continuity mistake: At the first house, the bag in the sleigh with all the presents in is ripped open when it falls off the roof. However, when Stewie and Brian leave the house, there is no tear in the bag at all. (00:32:55 - 00:36:45)
Factual error: In all the scenes where Peter wrecks Cleveland's house and Cleveland is in the bath, the tub always slides easily out of the house with Cleveland in it and onto the ground. There are no pipes or any kind of plumbing visible on the bathroom floor where the tub should have been connected.
Continuity mistake: At the start of Peter's fight with the Big Chicken, Peter is slammed into the wall, which cracks. After Peter gets up, the wall behind him is perfectly fine again. (00:07:05)
Peter, Peter, Caviar Eater - S2-E1
Continuity mistake: When Peter has become cultured and is talking to Coco and Jonathon, Jonathon's suit changes colour from brownish-green to grey. (00:14:00)
Continuity mistake: As Stewie is about to eat his brisket (just before he throws it at Meg) he is cutting part of it off. Just as he cuts through the shot cuts and you can see the brisket is now back in one whole piece. You can also see the mashed potatoes change from white to green.
Continuity mistake: In the scene where the family are singing an African song, they all point their arms up to the ceiling yet in the next shot, Lois's arms are immediately cupped and pointed downwards - you don't see her moving her arms to that position.
Continuity mistake: When they are at the football game and Meg and the flag girls come out, and after Lois says, "Oh Peter, isn't she beautiful?", Peter's hot dog is yellow and has ketchup. But after he throws it on the field, it is back to normal. (00:07:30)
Continuity mistake: When Peter first goes down into the basement, there is no railing on the stairs. One suddenly appears later in the same scene. (00:08:40)
Continuity mistake: Peter and Luke Perry go into Peter's house, and sit down. The door is open when they sit down. In the following close-up of Luke Perry, the door is closed, with no evidence of anyone, or anything, closing it.
Fifteen Minutes of Shame - S2-E12
Continuity mistake: When the Griffins are invited down from the crowd, the whole audience seating arrangement changes when the camera view is from behind them facing onto the audience.
Death Lives - S3-E6
Continuity mistake: The white volleyballs turn into colorful beach balls and then back into white volleyballs. (00:13:05)
Continuity mistake: When Chris tells Meg not to rake the two leaves because they are his friends, one leaf is brown and the other is yellow. After Meg picks them up and crushes them, they're both brown.
There's Something About Paulie - S2-E16
Continuity mistake: In the scene where Peter is outside the cinema waiting for Big Fat Paulie, he has a tie on, however when he is in the cinema walking up the aisle, it's gone. When he gets out again, he has it on. (00:07:40 - 00:08:50)
I Never Met the Dead Man - S1-E2
Continuity mistake: During the scene where Peter interrupts Meg class in a towel, there is a dotted line in the diagram on the board at first, but later, the line is gone. (00:07:10)
Character mistake: At the end, Brian says, 'I guess some mysteries are better left unsolved' and everyone else murmurs their agreement, yet Bonnie is heard saying, 'Peter's got a point'. She should have said Brian.
Answer: Mort is Jewish, and Walt Disney was said to be antisemitic. So it would make sense in a Disney universe all the inhabitants would share his supposed beliefs.
MasterOfAll