Brian Goes Back to College - S4-E15
Continuity mistake: When the guy from the New Yorker rings Brian, a newspaper appears on his desk between shots. (00:02:50)
Brian Goes Back to College - S4-E15
Continuity mistake: When Stewie runs in to film Brian after he got fired, Lois has her arms crossed. When we see it from the camera's POV, her arms are in completely differently positions. (00:07:10)
Brian Goes Back to College - S4-E15
Continuity mistake: When Brian arrives at Brown, his bag strap is across his body. When the shot changes, it's just on one shoulder. (00:08:00)
Brian Goes Back to College - S4-E15
Continuity mistake: When we see Brian outside of Brown University for the first time, a man in a yellow shirt appears from nowhere. (00:08:00)
Brian Goes Back to College - S4-E15
Continuity mistake: Brian stands outside of the gates of Brown University. The girl entering next to him has a backpack with a top flap that changes from brown to yellow and back. (00:08:05)
Brian Goes Back to College - S4-E15
Continuity mistake: When the team arrives at the cat stuck in a tree, they knock a mailbox onto a pathway. When the tree falls on the house, the van and mailbox have moved. (00:10:30)
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)
The Courtship of Stewie's Father - S4-E16
Continuity mistake: After "Herbert the Pervert" leaves the Griffins' house, the size of the couch in relation to Chris changes distinctly between shots.
Continuity mistake: When Joe lifts his steak to his mouth you can see a section cut out of the steak on the plate. When he shoots the plate, the steak is whole. (00:01:50)
Continuity mistake: After Joe shoots a hole in the table, the hole changes size. (00:02:00)
Continuity mistake: At the steakhouse before Joe shoots the table we see Peter's knife on his plate but it suddenly appears on the table. (00:02:00)
Continuity mistake: The fork with steak on it that's on Joes plate disappears between shots. (00:02:05)
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)
Continuity mistake: Going up the ladder Lois has Stewie in her left arm. However, as she comes through the window he is in her right arm. (00:06:00)
Continuity mistake: When Lois turns on her parents' bedside lamp, it only casts a small beam of light onto the floor, but later in that scene, the same beam of light is much bigger. (00:06:15)
Continuity mistake: When we first see all the guys at the NAAFP meeting, there are two guys in the top right corner; one with a singlet and one with brown hair and a green-brown T-shirt. In the next shot, these two guys come in from the opposite side of the screen. (00:12:15)
Continuity mistake: When the fat guys arrive at Peter's group, pay attention to the Asian guy in the first seat third row. After they open snacks he has switched seats with the other guy in the first seat second row. The guy he swapped seats with hair also changes color. (00:12:40)
Continuity mistake: Just after Patrick 'kisses' his imaginary girlfriend goodbye and tells Brian to look after her, Brian switches position on the couch. In the first shot he is sitting on a crack between couch pillows, but in the next shot he is sitting in the middle of the centre pillow. (00:13:50)
Continuity mistake: At the start of the episode there's no coffee table beside the couch. When Brian is trying to prove to Peter that he has gravitational pull because of his weight, there's now a table with a bowl of fruit and a book.
The Father, The Son, and The Holy Fonz - S4-E18
Continuity mistake: When Francis arrives, he changes from standing on the threshold to standing inside the house, even though he could not have moved between shots. (00:01:30)