Tony's security preparations for a possible Vice-Presidential visit are hampered when Kirby's despondent boyfriend Howard locks himself inside Tony's command center.
Melanie allows a stakeout to be set up in her apartment, where Tony inadvertently finds some damaging evidence of another sort — in Melanie's diary.
Days before her wedding, Lucy spends an evening reminiscing with Tony, and memories prompt her to wonder if she's doing the right thing. Meanwhile, a puppy brings out Kirby's maternal instincts.
After being grazed by a bullet during an arrest, Tony is sent to a psychologist for evaluation and is declared unfit for duty when he insists that the incident had no impact — despite the fact that his own father was fatally shot when Tony was eleven.
It's Saturday night, and Tony's mother and Mickey both have dates; but Tony's going stag to the mayor's Christmas party, where Melanie's on her own too — or so Tony thinks...
Tony and Lucy suspect that Mickey's new best friend is a bad influence; the squad room prepares for its annual celebration of Frank Sinatra's birthday.
Melanie claims she has no problem with the fact that her college friend Allison is attracted to Tony. Meanwhile, Kirby collars a crook Al's been after for years.
Tony and Melanie get stranded in his car on their way to the Poconos, where she's supposed to spend Thanksgiving with attorney Jay Gallagher; Regelski breaks Al's beloved coffee mug.