No Way Out - S2-E7
Revealing mistake: When Fletch falls through the hole in the yard, this is obviously performed by a stunt double as he has a different hairstyle to Ronnie Barker.
Porridge (1973)
1 mistake in No Way Out - chronological order
Starring: Fulton Mackay, Ronnie Barker, Brian Wilde, Richard Beckinsale
Genres: Comedy
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: Fletch has a teenage son by the name of Raymond who was never actually featured in the show. He did turn up in the follow-up, "Going Straight", and was played by Nicholas Lyndhurst, aka Rodney Trotter from Only Fools and Horses.