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: When Peter catches up to Brian in the golf cart at the rehab facility, Brian is seen wearing a track suit with a headband and holding hand weights. Peter convinces him to go mess with the pregnant teens across the lake and in the row boat over Brian is still wearing the tracksuit and headband. However, when we see them enter a room where the pregnant teens are he has obviously taken off the tracksuit and headband and is just seen wearing his dog collar.
Add timeTobin OReilly
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.
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.