Dear John is an American sitcom television series that aired on NBC from October 6, 1988 to July 22, 1992. It was originally based on the British sitcom of the same name. The sitcom is set in New York City. Judd Hirsch stars as John Lacey, a teacher at a preparatory school in Manhattan. After ten years of marriage, one day he returns home and finds a Dear John letter: His wife, Wendy, is leaving him for his best friend. When the court grants Wendy the house and custody of their son, Matthew, John moves into an apartment in the Rego Park neighborhood of Queens. The building is actually 27-56 27 Street in Astoria, Queens. When he later moves, he moves one street away to 28-28 29 Street, also in Astoria, Queens.
Six months after the divorce, John joins the One-To-One Club, a support group for people who are divorced and single. The series chronicles John's life and the lives of his new friends at the One-to-One Club.