24th Apr 2004
Sex, Losers and Videotape - S5-E20
Continuity mistake: When Jack leaves his class to go talk to Grace, they are all sitting. As the angle changes we can see through the glass panel that they are all standing and talking to each other literally one second later.
22nd Jun 2003
Continuity mistake: When Grace is telling Will about his dad's affair, she mentions that he grabbed the other woman's ass when she brought him a packet of Goobers during the interval. The thing is, she sees them for the first time during the interval, and we see the conversation that follows. The mistress brings him wine, not Goobers, and he doesn't grab her ass.