Terrance Dicks is an English writer, best known for his work in television and for writing a large number of popular childrens books during the 1970s and 80s.

His break in television came when his friend Malcolm Hulke asked for his help with the writing of an episode of the popular ABC (ITV) action-adventure series The Avengers, on which Dicks received a co-writers credit on the broadcast. He also wrote for the popular ATV soap opera Crossroads.

In 1968 he was employed as the assistant script editor on the BBCs popular science-fiction series Doctor Who. Dicks went on to become the main script editor on the programme the following year, and earned his first writing credit on the show when he and Hulke co-wrote the epic ten-part story The War Games which closed the sixth season and the era of Second Doctor Patrick Troughton.

Dicks went on to form a highly productive working relationship with incoming Doctor Who producer Barry Letts, working as the script editor on each of Letts five seasons in charge of the programme from 1970 to 1974. After his departure, Dicks continued to be associated with the programme, writing four more scripts: Robot (1975, the opening story of Tom Bakers era as the Fourth Doctor), The Brain of Morbius (1976), Horror of Fang Rock (1977), State of Decay (1981) and the 20th anniversary special The Five Doctors (1983).

Dicks also contributed heavily to Target Books range of novelisations of Doctor Who television stories, writing more than sixty of the titles published by the company. In this role, he would attempt to enlist the original teleplay author to write the books whenever possible, but if they could not or would not, then Dicks would often end up writing the books himself (although he also enlisted other writers including one-time Doctor Who actor Ian Marter and former series producer Philip Hinchcliffe). During the 1990s, Dicks contributed to Virgin Publishings line of full-length, officially-licensed origina