Gavin Troy was a Detective Sergeant working with Tom Barnaby for the first 7 series.
He is a local man and in the episode Written in Blood stated that he attended Causton comprehensive from 1983 to 1990. He is young to be a detective sergeant, a point often commented on. He is very bright and ambitious, though it is usually his boss who solves the crime, often after Troy has made the wrong conclusion. In contrast to the tolerant Barnaby, Troy is one to make non-politically correct remarks, often concerning his disdain for homosexuals. He is known to make other inappropriate comments, often at the least fortunate times. He was promoted to Detective Inspector and transferred to Middlesbrough at the beginning of the seventh series. His relationship with Barnaby has always been warm and the two make a formidable pair. He makes a one off re-appearance in the Series 11 episode Blood Wedding, to attend the wedding of Cully Barnaby.
Personality and appearance
The character of Troy is a very different character to that of the one in the novels by Caroline Graham. In the novels, he is married to Maurieen and has a daughter. He resents anyone wealthier than him, and thinks all women should desire him. He is fastidious and alway turned out in his best.
He usually ogles at women and was incredibly nervous in Episode 3 Series 1, when he went into the bookshop and was greeted by the shop keep, a gay male. He also stared at Christopher Wainwright - or Andrew Carter - for an uncomfortable amount of time in Episode Six Series One when he was around.
In one or two episodes, Gavin has been seen with Cully, Barnaby's delightful daughter.
In series 6, Episode 2, "Death and Dreams" - Gavin and Cully spend a great deal of time together and eventually kiss briefly during an escapade to prove he can climb a rope ladder.