If I'm Dyin' I'm Lyin' - S2-E9
Continuity mistake: When Peter, Anne Frank, and a group of people (presumably Anne Frank's family) are hiding from the Nazis, Anne Frank and her family look over to discover Peter munching crisps. In the next shot, Anne Frank's family look somewhat different, in fact they are a different group of people entirely. (00:06:40)

Continuity mistake: The length of the antennae on the remote control on the back of Chris's head constantly changes between shots.
If I'm Dyin' I'm Lyin' - S2-E9
Continuity mistake: When Peter says "There's gotta be an explanation for all this" the background is mirrored. (00:20:10)

Continuity mistake: When Diane Simmons is announcing that she will play Anna, the five little pictures behind her change between shots. (00:11:15)

Continuity mistake: In 'Wasted Talent', near the end of the Chumba-Wumba song about Joe being in the wheelchair, the Chumba-Wumbas wheel Joe till he is about 15 yards away from the gate. Then as the shot cuts, Joe and the Chumba-Wumbas are standing right next to the gate. How did this happen? Nobody moved him. (00:10:30)

Continuity mistake: When Peter drinks the water after having all the dehydrated meals, he expands. Then in the next 'shot' he is much bigger, even though there is no time for him to have expanded further. (00:09:05)

Continuity mistake: When Stewie is just about to fly into the fan in the Griffin's living room, having just attached the antennae to Chris, a green balloon appears on his back with the other three balloons.

Continuity mistake: When Stewie has been picked up by Lois and is being kissed by her, Brian freaks out. When you first see Stewie and Lois, Stewie's hands are on her shirt, next shot, they're on her arms. (00:19:40)
There's Something About Paulie - S2-E16
Continuity mistake: In the scene where Peter is showing Cleveland his new car, the first shot shows a car that resembles a VW Beetle. In the next shot the car resembles a Mercedes CLK.
Fifteen Minutes of Shame - S2-E12
Continuity mistake: When Peter puts his brush to the paint, you can tell that he dabs it in green or yellow paint, but when he paints the woman's blouse, it is red paint. (00:00:25)

Fifteen Minutes of Shame - S2-E12
Continuity mistake: The bush that the artist is painting in the pre-credits scene changes between shots. (00:00:10)
Continuity mistake: When Death is incapacitated and Peter is wearing the Death cloak, the stool that Death's legs are resting upon changes from having purple to brown legs. (00:16:45)
Continuity mistake: During the yard sale, Lois goes outside the house but she doesn't close the door. She talks to Peter and the shot later, the door is closed.
If I'm Dyin' I'm Lyin' - S2-E9
Continuity mistake: When the crowd is outside Peter's house wanting Peter to heal them, a lady in pink comes out and says "It's him!". While she does this she is standing on the lawn, but in the next shot she is standing on the cement path. Other people in the crowd change position in this cut too.

Continuity mistake: After Mayor West enjoys eating the taffy, when it cuts to the Griffin family standing on their lawn, the post-mounted mailbox is placed on the right side of the front door's walkway, but then it switches to the left side of the walkway.

Continuity mistake: When Lois goes to the bedroom, she opens the door and trips the wire across the door. The wire is strung across the bottom of the door but when she turns the light on, it has disappeared.
Continuity mistake: When Peter is singing, he stops and starts dancing. Mr weed is directly behind him, then in the next shot of other people dancing, he is with them, then in the next shot he is behind Peter again. (00:11:35)

There's Something About Paulie - S2-E16
Continuity mistake: When Meg is first seen performing 'Death of a Salesman' she changes position between shots. (00:12:35)
There's Something About Paulie - S2-E16
Continuity mistake: A mob member at Cleveland's deli offers to help Peter get a new car by stealing the used junker he bought and have insurance get him a new one. The new blue car he receives appears to resemble a Volkswagen Beetle when it first appears, but in the second shot the car's body is more Mercedes-like. (00:05:17)

Continuity mistake: As Lois pats Brian, her elbow changes position. (00:16:45)
Answer: Lacey Chabert was the actress who originally voiced Meg in early episodes. She left of her own accord due to being in school and other acting work; Seth MacFarlane has stated there was no tension with her leaving, but it makes for a handy joke for the show.
Jon Sandys ★