Batman Stands Pat (2) - S1-E14
Continuity mistake: Batman's plaster-covered costume gets an instant dry cleaning en route as he drives from the sculptor's studio to the batcave. (00:05:00)
Continuity mistake: In "The Unsinkable Mr. French" (season 5), the amount of whipped cream on Mr. French's jacket increases as he's getting up from the couch. (00:23:00)
Continuity mistake: When Davy is telling Mike and Peter that Otto and Sigmund are trying to kill Bettina, the sandwich Mike has switches from his left hand to his right hand in a split second.
Goodbye, Hello, Goodbye - S1-E2
Continuity mistake: In Season 1, Episode 2 ("Goodbye, Hello, Goodbye"), just before Ann Marie and the doorman enter her new apartment with 2 suitcases and a handbag, a wider view of her apartment shows the same 2 suitcases and handbag sitting inside by the door. (00:03:34)