Derek Deadman portrayed Tom, the landlord of The Leaky Cauldron, in the film adaptation of Harry Potter and the Philosopher's Stone. He was replaced by Jim Tavaré for the film adaptation of Harry Potter and the Prisoner of Azkaban.
- Deadman played Ringo in 39 episodes of the TV series Never the Twain, between 1981 and 1991.
- He also played a ruthless Sontaran Commander in the Doctor Who serial The Invasion of Time.
- He played the part of Robert in Time Bandits.