Continuity mistake: When Buffy is talking to Riley, she puts the scarf on her head, on his hand. He talks to her and says "Maybe I am the bad guy," and in the next frame her scarf is back on her head again, then off again in the next frame. (00:24:20)
Continuity mistake: In the first episode of season 10, when Marissa is holding a dog while talking to Elaine, the way her arm lies around the dog's neck changes several times between shots.
Book Smart - S2-E8
Continuity mistake: The word "Puritans" is written differently on the chalkboard between shots, in the scene where T.J. is discussing Puritans with Mr. Delk.
Continuity mistake: When Sheila Carlisle has hanged the dead head up on the wall of Eugene's office, they are all looking at it and the eyes are looking straight in to the room. Later in the episode, the eyes are looking more to the right.
Compromising Positions - S1-E2
Continuity mistake: Ally's suit switches from blue to black in the same scenes from mid episode to the end.
The Curious Tale of Mr Spearfish - S3-E1
Continuity mistake: The bullet marks on Lenny keep changing places.
Continuity mistake: When the Joker gets mad at Harley, the fish she uses to defend herself changes both size and shape with each shot.
Demon Suite Murder Case: File 1 - S1-E16
Continuity mistake: In the second murder, the toy tops on the floor are in a different position depending on the shot. (00:12:55)
Continuity mistake: When we first see Darren's sister coming out of the apartment she has a pram with her, but there's no baby in it, but in the next shot were we see her go back inside and up the stairs she is carrying her baby.