Factual error: Two cars in this episode set in 1964 are too new, Robert Stratton's Wolseley 1100 or 1300 is a mark two which didn't start production until 1967, and George Gently's Rover 3 litre is a 1966 mark 3 model fitted with rostyle wheels from the 1967 3.5 litre model.
Factual error: Episode starts "Durham 1966". When Inspector George Gently and Bacchus are questioning the girls on top of the "TV" studio the High Level Bridge is in the background and there are overhead electric masts on the bridge. Railways around Newcastle were not electrified until 1990. (00:22:00)