Derek Benfield (11 March 1926 – 10 March 2009) was a British playwright and actor. He was born in Bradford, West Riding of Yorkshire, and educated at Bingley Grammar School. He was the author of the stage farce Running Riot and played Patricia Routledge's character's husband in Hetty Wainthropp Investigates (1996–1998). He also appeared with Colin Baker as John Hallam in the Doctor Who audio play Catch-1782 produced by Big Finish Productions.