After months of dating the acerbic and outspoken Sherry Dempsey (Marsha Mason), Martin (John Mahoney) decides it is time to pop the question. This does not rest well with Martin's sons, Frasier (Kelsey Grammer) and Niles (David Hyde Pierce), who have never warmed up to Sherry -- and are even less enamored of her once they learn some shocking facts about her past. Without giving away the ending of this episode, suffice to say that the cast of Frasier will soon be "lighter" by one. ~ Hal Erickson, Rovi