Dear John was a British sitcom, written by John Sullivan. Two series and a special were broadcast from 17 February 1986 – 21 December 1987.
This sitcom's title refers to letters - known as "Dear John" letters - from girls to their boyfriends breaking off a relationship. John discovers in the opening episode that his wife is leaving him for a friend, and he is forced to find lodgings. In desperation, he attends the 1-2-1 Singles Club and finds other members mostly social misfits.
In 1988, an American adaptation of Dear John was produced by Paramount for the NBCnetwork. That series lasted for four seasons.