Continuity mistake: Benson visits Stabler at his home to confronts him about the FBI detail he has ordered to protect her. They talk outside and then Benson is seen walking away. The next shot shows a side shot of Benson approaching him again in silence but mouthing words to him. (00:49:00)
Continuity mistake: Tony's hair length alternates between a short buzz cut and longer in different shots in the scene where Sil, Paulie and Chris visit him after his mother dies.
Continuity mistake: Right after Cordelia has her vision, Wesley goes to the whiteboard. In the "Case" column he writes "N.D.U.O." Underneath what looks like "CARYNSS" crossed out. But once they find out that it is a Prio Motu demon and Angel writes it on the whiteboard, "N.D.U.O." disappears even though Angel did not rub it off.
Election Day (Part 1) - S7-E16
Continuity mistake: When Bruno and Bob are poring over exit polls, they mention that Santos seems to be leading in North Dakota, and comment that it is a state that hasn't gone Democratic in forty years. While that is true in the real world, in the fictional West Wing world, it is stated in Season 4 that Bartlet won the Dakotas in his landslide reelection.
Continuity mistake: Did any one else notice that Sheridan gave birth without ever taking off her pants?
Continuity mistake: When Vincent is shot there's a mismatch between the point where the bullet is fired and the point where it destroys the car window behind him. The window is broken too early.
Continuity mistake: When Faith is at home with Bosco and her kids after arresting Fred, she takes off her heavy police jacket. In the next shot, it's back on and she takes it off again.
Continuity mistake: Emma falls off the roof and into a water butt when she is being chased by the villains, the police pull her out and she is soaking wet. A few seconds later she screams when the villain catches Nicola, and when they fall through the roof she is dry.