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Derrick George Sherwin (16 April 1936 – 17 October 2018) was an English television producer, writer, story editor and actor. After beginning his career in the theatre, Sherwin became an actor in television before moving into writing. He became the story editor on Doctor Who and, as the producer of the series in 1969, he oversaw the transition from black-and-white to colour by producing Patrick Troughton's final story and Jon Pertwee's first. He also co-produced Paul Temple for the BBC. Wikipedia