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 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.
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.
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