Continuity mistake: When Peter shows Lois the newspaper about the play the headline "Long live this King" is in black text. In the next shot when he puts the paper on the bed, the headline has changed to red text. (00:21:10)
Other mistake: In the scene where Einstein is stealing Smith's theory, when Einstein pulls the metal bars down, they should land on Smith's head, but Smith inexplicably moves forward and the bars land on his back.
Continuity mistake: When Diane Simmons is announcing that she will play Anna, the five little pictures behind her change between shots. (00:11:15)
Continuity mistake: Lois is wearing a green dress when peter is looking at her from the stage, but she's wearing a blue dress throughout the scene.
Continuity mistake: After the "Lint" scene, Meg's glasses disappear.
