: Gary Sparrow, a mundane TV repairman in 1990s London, discovers a time portal in Duckett's Passage that leads him back to wartime London in 1940.

Often confused with the 1931 ballad, this is a different R&B/Doo-wop classic.

: The song appeared in the classic Star Trek episode " The City on the Edge of Forever ". 🎶 "Goodnight, Sweetheart, Goodnight" (1953)

: Used famously as a lullaby in the film Three Men and a Baby .

: Originally Michelle Holmes, later Emma Amos.

The theme tune of the show is actually a famous ballad that dates back much further than the series.