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.
Divorce Venusian Style - S3-E1
Continuity mistake: When Bill and Ralph are returned to Earth they show Pam the instruction book. Pam is wearing pink nail polish, but in the closeup as she opens the book and sees the alien writing Pam's fingernails don't have nail polish. (00:32:20)