Continuity mistake: When Stewie is watching Jolly Farm Revue for the second time, he is sitting roughly in the centre of the mat, but in the next shot, he is sitting near the edge of it. (00:03:15)
If I'm Dyin' I'm Lyin' - S2-E9
Continuity mistake: Before Lois runs upstairs to Get Stewie out of the bloody tub, the pictures on the wall (behind Peter's head) of Chris and Stewie switch places between shots.
The Tan Aquatic with Steve Zissou - S5-E11
Continuity mistake: At the very beginning of the episode, when we first see Peter and co. at the golfcourse, Peter and Quagmire get a lot closer between shots. (00:00:30)
Continuity mistake: When Stewie is building with blocks, you first see a pyramid with three blocks on the bottom and two on the top. The shot changes, and he puts two more on the top, near the edge. When the shot changes again, suddenly there are five blocks on the bottom, six on the second layer, and two on the top near the middle. The letters and pictures are also all different. (00:09:50)
The Thin White Line (1) - S3-E1
Continuity mistake: When Brian is giving his speech at the end, it shows two policemen. The one on the left has a brown drink and the one on the right has a yellow drink. But in the next shot, the one on the right has a yellow drink and the one on the left has a clear drink. (00:21:05)
I Never Met the Dead Man - S1-E2
Continuity mistake: When Lois is feeding Stewie broccoli at the beginning in one shot the plate disappears from his table, and then in the next shot it is there with a fork next to it. (00:01:35)
Continuity mistake: During the breakfast scene when Peter is lying on the table, the food on the plates changes positions between shots. (00:04:45)
Ready, Willing, and Disabled - S3-E15
Continuity mistake: When Peter is convincing Joe to do something with his life, they are listening to the news and beer cans are everywhere. Then the news reporter says, "Better watch out for that skateboard." After he slips, look around the room: there are no beer cans anymore.
Mr. Griffin Goes to Washington - S3-E3
Continuity mistake: When Peter is sharpening the pencils, the ones that he throws on the table are much shorter than what he sharpened them to.
A Very Special Family Guy Freakin' Christmas - S3-E16
Continuity mistake: When Stewie contemplates that there is a hidden camera in the Santa ornament, the size of the red bauble next to the Santa changes between shots. (00:05:10)
Continuity mistake: When we first see Carter and the Griffins at the Newport racetrack, Peter's hands are on his thighs, but in the next shot, he is holding a cigar in his mouth. (00:11:10)
Continuity mistake: When Peter is talking to the tree, the tree changes colour between shots. (00:17:50)
Continuity mistake: In the 'Titanic' spoof, just as Jack says "Yeah, about that, I was pretty sure I was gonna die", his head and body change distinctly between shots. (00:16:25)
A Very Special Family Guy Freakin' Christmas - S3-E16
Continuity mistake: Brian gets the fur on his hands burned off by the kitchen fire, but when Lois goes crazy and goes into the living room, the rest follow her and the screen zooms out. When that happens Brian's fur is back on his hands.
Continuity mistake: In the scene where Peter and Lois are "getting dressed", the candles in the background switch from having candle holders to not having candle holders.
He's Too Sexy for His Fat - S2-E17
Continuity mistake: Stewie gets progressively fat throughout the entire episode, but in the last scene he is thin again.
Continuity mistake: Stewie takes the card from the predictor machine in his left hand but on close up it's in his right hand. (00:04:30)
Continuity mistake: When Stewie is in his room talking to Rupert and himself out loud about Janet we see that Rupert is on the left side of Stewie's pillow. When the camera pans over to Brian who overhears Stewie's musings, after Brian makes fun of Stewie the camera pans back and Rupert is gone. There is also a quick tete-a-tete on the color of Janet's eyes and the final shot is on Stewie and his crib and yet no Rupert to be found. (00:07:20)
Continuity mistake: During the end of Peter's "revised" version of "The King and I" right after the scene where Brian and Peter kung-fu fight, the scene transitions to the next scene where a bunch of girls with bikinis on are surrounding Peter. During the transition, a girl appears out of nowhere. She is blonde and is leaning on Peter. (00:19:10)
I Never Met the Dead Man - S1-E2
Continuity mistake: When Stewie ties the weather control device to the chimney, the black jump-lead is on Stewie's left (HIS left, not our left) and the red one is on his right, but in the next shot, they have switched positions. (00:18:55)