Terrance William Dicks (14 April 1935 – 29 August 2019) was an English author and television screenwriter, script editor and producer. In television, he had a long association with the BBC science-fiction series Doctor Who, working as a writer and also serving as the programme's script editor from 1968 to 1974. The Doctor Who News Page described him as "arguably the most prolific contributor to Doctor Who". He later became a script editor and producer of classic serials for the BBC.