Goodnight Sweetheart is a British science fiction time travel sitcom, starring Nicholas Lyndhurst, created by Laurence Marks and Maurice Gran, and produced by the BBC. The sitcom is about the life of Gary Sparrow, an accidental time traveller who leads a double life through the use of a time portal, which allows him to travel between the London of the 1990s and the London of the 1940s during the Second World War. The sitcom's creators, who also created Birds of a Feather and The New Statesman, wrote most of the plots for the episodes.