David Nelson Godfrey Mitton (13 July 1938 - 16 May 2008) was a British television producer and director, and an experienced model-maker and author, best known for producing and directing the children's TV series Thomas the Tank Engine and Friends and Tugs. During the 1960s, he worked with Gerry and Sylvia Anderson as a special effects technician on series such as Thunderbirds, Captain Scarlet and the Mysterons, Joe 90, The Secret Service and UFO.