Continuity mistake: At the end of the episode everyone is having a picnic. Joe says what the heck happened to that trophy and everyone's plates disappear. The table is completely empty.

Continuity mistake: When the guys are arguing over the trophy Quagmires teeth disappear for 10 seconds. His mouth is all black then they reappear.
Continuity mistake: When Lois is handing out everyone's lines for the play, Meg doesn't have glasses on. Split second later they appear. (00:09:47)
Other mistake: After Brian says Chris is tweaked and Chris says maybe the toad is Meg's, the bubbles in the aquarium stop moving.
Other mistake: In the flashback to Brian and Peter playing checkers, Brian's piece is not on the back row when he says "king me."
Peter, Peter, Caviar Eater - S2-E1
Continuity mistake: When Brian is holding Peter's Star Wars glass, it continually spins and changes positions in his hand between shots, with the figures painted on it being in different directions. (00:17:32)

Peter, Peter, Caviar Eater - S2-E1
Continuity mistake: In the flashback of how Lois' aunt helped her meet Peter, she calls for him as towel boy. A towel suddenly appears on the back of the aunt's chair when she calls for him that wasn't there before. (00:01:33)

Peter, Peter, Caviar Eater - S2-E1
Continuity mistake: When Peter starts trying to say it's OK to swear sometimes, the thermostat dial on the wall behind him, that was under the picture frame has disappeared from where it was. Then when Lois is next to him recalling to him how they met, the dial reappears on the wall. (00:01:10)
There's Something About Paulie - S2-E16
Continuity mistake: When Paulie is eating dinner with Peter, his pile of mashed potatoes keeps changing from white to green.

A Picture Is Worth 1,000 Bucks - S2-E11
Revealing mistake: When Brian is shaking his head saying he will never go to the theater with Peter again, you can see part of his neck is missing. (00:09:10)
Continuity mistake: When Peter and Brian are entering the Channel 5 Studio, we see a far view of Tom and Diane eating. The torn right sleeve (close to her hand) from the far shot shows that it reaches her elbow. In the close up shot, the sleeve doesn't go to her elbow. (00:09:20)
Continuity mistake: Death has the TV remote asking how old the TV is. As Lois talks, he puts it down, then it suddenly disappears altogether.
Continuity mistake: As Quagmire and Cleveland are talking to Peter, the hat Cleveland is wearing disappears and reappears between cuts.
A Picture Is Worth 1,000 Bucks - S2-E11
Audio problem: When Peter comes out of the bathroom with wet hands and goes to dry them, the sound of the dryer is heard before he touches the button.
Audio problem: At the piano competition you see Peter playing towards the left side of the piano and hear the pitch going higher. This wrong because the keys for the high pitches are on the right side of the piano.

A Picture Is Worth 1,000 Bucks - S2-E11
Continuity mistake: In one shot of the Griffins at the hotel, Brian's collar is yellow instead of red.

I Am Peter, Hear Me Roar - S2-E8
Continuity mistake: During Lois' fight with Gloria Ironbox, Peter is wearing his usual white shirt and not his suit for one shot, then goes back to wearing his suit. (00:20:40 - 00:21:10)

Continuity mistake: Lois is wearing a green dress when peter is looking at her from the stage, but she's wearing a blue dress throughout the scene.
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 ★