Visible crew/equipment: In the common room, when Robbie says to Trev, "Look lively with that coffee," the overhead mic appears in shot at the top of the screen.
Grange Hill (1978)
1 visible crew/equipment mistake in Episode #13.1 - chronological order
Starring: Gwyneth Powell, Lee Cornes, Sally Geoghegan, Stuart Organ
Genres: Family
Other mistake: When Hudson is briefing the girls' football team he calls Mel Sarah, mixing up the character name (Mel) and actress (Sarah Lawrence).
Maria: Do you know what you are, Parrott?
Mr Parrott: Mr Parrott to you.
Maria: A complete prat. The kids know it, the teachers know it, and now it looks like your ex-fiancée has got the message as well.
Trivia: Future supermodel Naomi Campbell appears throughout series 5 as an uncredited extra.