The Second Doctor must battle against the Great Intelligence, in a new edition of a Doctor Who classic.
Terrance Dicks worked on scripts for The Avengers as well as other series before becoming Assistant, and later full Script Editor of Doctor Who from 1968. Dicks worked on the entirety of the Jon Pertwee Third Doctor era of the programme, and returned as a writer - scripting Tom Baker's first story as the Fourth Doctor- 'Robot'. His later script writing credits on Doctor Who included the 20th anniversary story 'The Five Doctors'. Terrance Dicks novelised many of the original Doctor Who stories for Target books, and has written original Doctor Who novels for BBC Books.