The Greatest American Hero (1) - S1-E1
Continuity mistake: When Ralph picks up the chair that was tossed out of his classroom, in the exterior shot he walks into the room holding the backrest's left metal post, but in the interior shot as he walks in Ralph is now holding the backrest's right metal post. (00:05:35)
Tiptoe Through the Penfolds - S5-E3
Continuity mistake: Although Danger Mouse is supposed to be on his own, when he turns a corner in the car, in the overhead shot, you can see Penfold sat next to him.