Continuity mistake: During the roller skate sequence he is wearing a jumper, then before he enters the shop he is in only a shirt, then back to a jumper inside the shop.
Some Mothers do 'Ave 'Em (1973)
1 continuity mistake in Father's Class
Starring: Michael Crawford, Jane Hylton, Michele Dotrice, Jessica Forte
Genres: Comedy
Revealing mistake: When Frank is the pixie in Santa's grotto, a young boy fires something at Frank from his catapult. Although Frank reacts as being hit, the boy doesn't actually fire anything at all.
Frank: My father was in the battle of Britain, he was shot down seven times. I wanna be just like him.
Trivia: Michael Crawford was the producers' third choice for the role of Frank Spencer. The part had been previously turned down by both Norman Wisdom and Ronnie Barker.