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David Nelson Godfrey Mitton (27 February 1939 – 16 May 2008) was a British director, producer, writer, model maker and special effects technician. He was best known for producing and directing the children's television programmes Thomas & 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. Wikipedia