He was talking after an exclusive RTS West of England screening of the show in Bath at the end of February.
The series pairs Jason Watkins as the diffident Bath-born-and-bred DS Dodds and his ambitious boss, DCI McDonald, who has transferred from south London to further her career. She is played by Tala Gouveia.
“It was always going to be Bath. Cop shows are often set in stations. It was important for Dodds, as a different kind of cop, to be out in the field,” said Murphy, who wrote both feature-length episodes, which aired on ITV in March.