Who Killed His Royal Highness? - S1-E21
Continuity mistake: When Archie tries to kill Burke with the fireplace poker, Burke knocks him out with a punch that sends him flying over the back of the couch. The stunt man lands on his side, facing the couch. But when Burke looks over at the unconscious Archie, he's lying face up and several feet farther to the left than the stunt man was in the previous shot. (00:48:20)