Goodnight Sweetheart is a sitcom that ran for six series on BBC1

BBC One

BBC One is the flagship television channel of the British Broadcasting Corporation in the United Kingdom. It was launched on 2 November 1936 as the BBC Television Service, and was the world's first regular television service with a high level of image resolution...

 from 1993 to 1999. It stars Nicholas Lyndhurst

Nicholas Lyndhurst

Nicholas Simon Lyndhurst is an English actor. He is best known for his roles as Rodney Trotter in Only Fools and Horses, Gary Sparrow in Goodnight Sweetheart, and as Adam Parkinson in Carla Lane's series Butterflies...

 as Gary Sparrow, an accidental time travel

Time travel

Time travel is the concept of moving between different points in time in a manner analogous to moving between different points in space. Time travel could hypothetically involve moving backward in time to a moment earlier than the starting point, or forward to the future of that point without the...

ler who leads a double life after discovering a time portal

Time portal

Time portals are doorways in time, employed in various fiction genres, especially science fiction and fantasy, to transport characters to the past or future....

 allowing him to travel between the London

London

London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

 of the 1990s

1990s

File:1990s decade montage.png|From left, clockwise: The Hubble Space Telescope floats in space after it was taken up in 1990; American F-16s and F-15s fly over burning oil fields and the USA Lexie in Operation Desert Storm, also known as the 1991 Gulf War; The signing of the Oslo Accords on...

 and the same area during the Second World War.

The show was created by Laurence Marks and Maurice Gran

Maurice Gran

Maurice Bernard Gran is one half of writing duo Marks & Gran. He co-wrote popular sitcoms The New Statesman, Birds of a Feather and Goodnight Sweetheart with Laurence Marks. He is also the co-author of Prudence at Number 10, a fictional diary supposedly written by Gordon Brown's P.A.-External links:...

, also creators of Birds of a Feather

Birds of a Feather

Birds of a Feather was a British sitcom that was broadcast on BBC1 from 1989 until 1998. Starring Pauline Quirke, Linda Robson and Lesley Joseph, it was created by Laurence Marks and Maurice Gran, who also wrote some of the episodes along with many other writers.The first episode sees sisters...

and The New Statesman

The New Statesman

The New Statesman is an award-winning British sitcom of the late 1980s and early 1990s satirising the Conservative government of the time...

.