 Howard Spitz, played by Kelsey Grammer (qv), says, "Writing a  sitcoms not hard. You just have a married couple, a bar in Boston  or a psychiatrist on the radio." This is a reference to both  _"Cheers" (1982)_ (qv) and _"Frasier" (1993)_ (qv), both of which  starred Grammer as Dr Frasier Crane, a psychiatrist who hung out at  a Boston bar on "Cheers" before moving to Seattle to start a radio  call in show in "Frasier".