Continuity: At the bottom of the stairs there is a picture of Peter and Lois, and the song "So Long, Farwell" starts. The kids start singing and you can see in the backround the picture is gone then comes back when the kids are going back up the stairs.

Continuity: When the black knight pushes Peter's face into the table, there are cream-coloured serviettes (napkins) laid out, but in the next shot, there are blue serviettes.

Factual error: In the scene where Lois drops Peter off at the Renaissance Fair, when Peter gets out of the car, the door opens the wrong way (the way suicide doors open). This is noted to be a mistake in the director's commentary.

Continuity: When the children are singing, "So Long, Farewell", as they are going upstairs they pass a picture with a grey-haired man and a dark-haired woman hanging along the middle of the stairwell. When they get to the top of the staircase, we see the exact same picture, but now at the head of the stairs.

Continuity: During the 'So Long, Farewell' parody, Stewie is seen putting his head on the landing on the stairs, when it cuts back to him, his head is resting on the second stair from the top.