The Goodnight Sweetheart T-Shirt is inspired by Laurence Marks and Maurice Gran's 1990's sitcom starring Nicholas Lyndhurst as time travelling romantic Gary Sparrow.

Goodnight Sweetheart ran for six series between 1993 and 1999 and tells the story of an accidental time traveller who leads a double life after discovering a time portal allowing him to travel between the London of the 1990s and the same area during the Second World War.

An updated special was broadcast in 2016 revisiting the characters from the original series.