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: I didn't know what a girl was until I was twelve years old.
Betty: You must of done.
Frank: How could I. I'd never seen one.
Trivia: Michael Crawford performed all of his own stunts in this series.