to publish a novelisation of his stage play Doctor Who - The Ultimate Adventure were not realised. As of September, 1980, Terrance Dicks' Doctor Who novelisations had sold three-and-a-half million copies and had been translated into ten different languages. During the 1990s, Dicks contributed to Virgin Publishing's line of full-length, officially licensed, original Doctor Who novels, New Adventures, which continued the series' storyline following the TV cancellation in 1989. Dicks wrote three Doctor Who novels for Virgin, and continued to write occasionally for the franchise after BBC Books assumed the licence in 1997. He wrote the first of the Eighth Doctor Adventures, titled The Eight Doctors, which was, for a time, the best-selling original Doctor Who novel. World Game, featuring the Second Doctor, is set during the so-called "Season 6B". Later contributions to the range were the Quick Reads books Made of Steel and Revenge of the Judoon, both featuring the Tenth Doctor and Martha Jones. His final Doctor Who short story, "Save Yourself", was published posthumously by BBC Books in October 2019. A compilation of his work chosen by fans entitled The Essential Terrance Dicks Volumes 1 & 2 was published in August 2021. Other television work Dicks also wrote for the ATV soap opera Crossroads. He co-created and wrote for the short-lived BBC science-fiction TV series Moonbase 3 (1973), and wrote for the ITC science-fiction series Space: 1999 (1976). During the early 1980s, Dicks served once more as script editor to producer Barry Letts on the BBC's Sunday Classics strand of period dramas and literary adaptations. When Letts returned to directing in 1985, Dicks succeeded him as the producer of the Sunday Classics, overseeing productions such as Oliver Twist, David Copperfield and Vanity Fair, before retiring from the BBC in 1988 to resume his career as a novelist. Children's fiction and non-fiction It was through his work on Doctor Who books that Dicks became a writer of children's fiction, penning many successful titles during the 1970s and 1980s. In 1976, he wrote a trilogy for Target Books, The Mounties, concerning a Royal Canadian Mounted Police recruit. They were followed from 1979 to 1983 another trilogy, Star Quest, which was later re-printed by Big Finish Productions. Beginning in 1978, Dicks penned The Baker Street Irregulars inspired by the Sherlock Holmes characters; the series eventually ran to 10 books, the last published in 1987. In 1981, he commenced work on