Miles to Go - S6-E15
Continuity mistake: In this episode Rose's boyfriend Miles is revealed to be in the witness protection program and has not had any contact with people from his past including family. However, in season 5, episode 15 his daughter visited and didn't approve of Rose.
Witness for the Execution - S2-E15
Continuity mistake: When David and Maddie are debating whether or not to help Lawrence Everett, the towel David uses to wipe shaving cream off his face jumps around during the scene. It's around his neck, then in his hands, then on his shoulder, and back in his hands, etc. (00:15:40)
Continuity mistake: Mike's hair keeps changing throughout the episode.