Continuity mistake: At the end when Fletcher returns to his cell after a weekend at home his cell is on the ground floor. All other episodes it's the first floor.
Porridge (1973)
1 continuity mistake in season 1 - chronological order
Starring: Fulton Mackay, Ronnie Barker, Brian Wilde, Richard Beckinsale
Genres: Comedy
Plot hole: Fletcher and Warren steal what they think is the right paper, so Godber can study it before he sits the exam. They are adamant that he has a very short time to go through it as they have to put it back before anyone misses it. After Godber refuses to cheat by reading it, Fletcher berates him, throws the paper on the cell floor, and storms out. What happened to replacing the stolen exam paper?
Fletch: I haven't been so put out since my son Raymond crept back into school one night and had a prior peek at the exam papers.
Godber: Did he?
Fletch: Yes he did! And he still didn't bleedin' pass.
Trivia: There was an American version of this classic UK show. It was titled On the Rocks. The script was reworked in order to make the style of humour suit the audience. It lasted one series before being cancelled in May '76.