Continuity mistake: When Cary Grant and the insurance agent are walking through the flower market, the girl in the bright pink dress walks past them twice.
Continuity mistake: Right at the end, Shirley MacLaine's dress has a large spot that disappears in the following shot.
Continuity mistake: Lobo has a very distinct scar on his cheek in the beginning and end of the movie. However, just after Dr. Strowski has entered the house, Lobo is seen coming down the stairs, and his scar is completely gone.