Jessica's First Christmas - S2-E7
Other mistake: When Frank open his front door to Mr. Jackson the walls around wobble.
Other mistake: The walls of Frank's house wobble whenever he opens the front door.
Some Mothers do 'Ave 'Em (1973)
2 other mistakes in season 2 - chronological order
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.