Gently Between the Lines - S6-E1
Factual error: Just before the end of the episode, the custody Sgt is arrested in connection with the death of the prisoner, and the modern day caution is used, which was not introduced until the '90's.
Inspector George Gently (2007)
1 factual error in season 6
Starring: Lee Ingleby, Martin Shaw, Simon Hubbard
Factual error: As Bentley is shown round the control room of the plant there are modern LED light panels and modern health and safety stop buttons which would not have existed in the 1960s.
John Bacchus: You're under arrest.
George Gently: He's under arrest, when I say he is.