When Phoebe finds out about the Monica/Chandler affair, she tests Chandler via flirtation. Ugly Naked Guy's apartment goes up for rent and Ross wants it.
Valentine's Day experiences for Niles, Frasier, and Martin and Daphne comprise this episode. First, Niles' cozy dinner for two at Frasier's apartment is ruined when the couch catches fire. Next, Frasier can't figure out whether his ambiguous dinner companion sees him as a co-worker or a romantic prospect. Finally, Martin and Daphne dine together, commiserating about their loneliness.
Doug faces possible criminal charges after Ricky Abbott dies when Ross shows Joi how to bypass system lockouts to give Ricky a lethal dosage of dilaudin. Doug is delegated to desk duty, Carol's clinic is shut down for acquiring the P.C.A. machine for Ricky, and Greene and Weaver face future disciplinary action for not reporting Doug's tampering with the double blind study. Carter and Lucy discover a mutual attraction, and the word spreads throughout the hospital. Benton studies with a sign language instructor. Romano begins his first day as acting ER chief.
