Revealing mistake: Doyle is making a chair in woodwork, but as he is fitting one of the legs he hits the chair with a hammer too hard and splits the wood then gets a telling off from Mr Hopwood, the wood was already split before Doyle hit it.
Grange Hill (1978)
1 revealing mistake in Episode #3.13 - chronological order
Starring: Gwyneth Powell, Lee Cornes, Sally Geoghegan, Stuart Organ
Genres: Family
Visible crew/equipment: When the minibus arrives at the running track the camera crew are reflected in the windows.
Vince: My uncle looks like Frank Bough.
Trev: Who cares, Vince?
Vince: My Auntie.
Trivia: Future supermodel Naomi Campbell appears throughout series 5 as an uncredited extra.