Revealing mistake: When Betty goes into labour in the night and goes downstairs with her suitcase, she tries opening the front door. You can see it moving with her pulling. And then when Frank goes to climb out of the window to follow the key, he climbs onto the sink, which almost rolls away, which reveals the fakery of the set.
Some Mothers do 'Ave 'Em (1973)
1 revealing mistake in The Baby Arrives
Starring: Michael Crawford, Jane Hylton, Michele Dotrice, Jessica Forte
Genres: Comedy
Jessica's First Christmas - S2-E7
Visible crew/equipment: When Frank is loading the lorry at the warehouse, he drives the forklift onto the lorry, then the lorry drives off while he and the forklift truck are still on the back. As the lorry pulls away you can see the camera crew on the other side of the road filming the next shot.
Frank: My father was in the battle of Britain, he was shot down seven times. I wanna be just like him.
Trivia: Michael Crawford performed all of his own stunts in this series.