David Simeon appeared in two Doctor Who television stories: as Private Latimer in Inferno and Alastair Fergus in The Dæmons.
Simeon debuted in four episodes of Sexton Blake in 1967, after which he appeared on Special Branch, Paul Temple, Z-Cars, Fawlty Towers, Boon, Minder, Keeping Up Appearances, Coronation Street, Casualty, The Bill, EastEnders and Doctors. However, he is best known for playing Det. Con. Mickey Finn on Hunter's Walk and Ken Kennedy on Lucy Sullivan Is Getting Married. He also appeared in the 1988 film A Fish Called Wanda.