"Goodnight Sweetheart" is a British television sitcom that originally aired from 1993 to 1999. The show stars Nicholas Lyndhurst as Gary Sparrow, a man who discovers a time portal that allows him to travel between the 1990s and the 1940s. This unique premise leads to comedic situations as Gary navigates his life in both eras, balancing his modern-day marriage with Yvonne and his romantic involvement with Phoebe from the past. The series combines elements of romance and comedy, exploring themes of love, fidelity, and the challenges of living in two different times. It was well-received for its clever writing and engaging characters, becoming a beloved part of British television history.