John Vivian Drummond Nettles, OBE (born 11 October 1943) is an English actor and writer. Nettles is perhaps best known for playing the lead roles in the long-running television series Bergerac and Midsomer Murders.
Nettles was born in St Austell, Cornwall in 1943. His birth mother was an Irish nurse who came to work in the United Kingdom during the Second World War. He was adopted at birth by carpenter Eric Nettles and his wife Elsie. As a youth he attended St Austell Grammar School. In 1962, he studied history and philosophy at the University of Southampton. There he first performed as an actor, and after graduation he joined the Royal Court Theatre.
Nettles played Laertes to Tom Courtenay's Hamlet in 1969 at the University Theatre for 69 Theatre Company in Manchester. From 1969 to 1970, he was in repertory at the Northcott Theatre in Exeter, and in the latter year had his first screen role in the film One More Time. The following year he played Dr. Ian Mackenzie in the period drama A Family at War, a role he continued until 1972. Following that he had small parts in many TV programmes including The Liver Birds, Dickens of London, Robin of Sherwood and an episode of Enemy at the Door called "Officers of the Law", first broadcast in March 1978. The latter was set in Guernsey during the Second World War German occupation and Nettles played a police detective ordered to work for the Germans and anguished over the conflict between his duty and collaborating with the enemy. He played fraudster Giles Sutton in ITV's Heartbeat.