David Sibley (born 16 July 1948) is an English actor.

He is best known for character roles in several television series: as twisted radio DJ Tom Everett in BBC television detective series Shoestring (in the episode Mocking Bird); and in Doctor Who as Pralix (in The Pirate Planet).^[1][2] He appeared on a DVD extra when this story was released recently.^[3] His first regular television role was in Wings in 1977.^[1]

Other appearances include Blake's 7, Survivors, Fun at the Funeral Parlour, Target, Minder, Lovejoy, and the film Gandhi.^[2] He appeared as Eric Birling in the 1982 BBC adaptation of J.B. Priestley's An Inspector Calls.^[4] He returned to television in The Year That London Blew Up (1995), a dramatisation of the IRA attacks on London in 1974–75. He played John Carver in Midsomer Murders in 2010.^[5] Between 2001 and 2012 he played four different characters in Doctors. In 2012 he was in New Tricks episode Part Of A Whole, playing journalist Nigel Baxter.^[6] 2014 starred as Freddie in the supernatural thriller The Sleeping Room.^[7]