 It parodies most (if not all) of the subgenres of science fiction but is first and foremost an 'odd couple' type comedy (the couple in question being the characters of Rimmer and Lister).Running for more than eight series, the idea was originally developed from the sketches introduced on Grant and Naylor's 1984 BBC Radio 4 show "Son of Cliché".The original version of "Doctor Who" lasted until 1989.