Peter moves into apartment 12D.
Although Jack claims to know Peter's sexuality, he doesn't tell Will or Grace. Peter never reveals it throughout the episode, and we never find out if he was gay or straight.
The building Will & Grace live in has all the floors designed the same way, but for some reason 12D is in the same position in front of the elevator as Will's apartment, 9C.
Peter: (to Grace) You have the most beautiful smile.
Grace: (laughs coyly) It's a little crooked.
Peter: Now, so was Audrey Hepburn's.
Grace: Oh! No... I hate my smile.
Will: Then stop smiling.
Jack: Will, I told you. You live with a hetero long enough, you're going to catch it.
Karen: Well, I'm going to miss you, Driver, but I'm sure you'll land on your feet..unlike those people you hit.
Jack: Ah yes, many have sought my council on this subject. They say Jack is a wise man, Jack is a dangerous man, Jack is a great man NO... Jack is just a man. A man who knows man who like man.
(Will and Grace are arguing over Peter)
Will: Oh, please! You've had plenty of dips in the love pool. I'm still in the cabana trying out floaties.(Will picks up the phone)
Jack (to Will): So what's cookin', average lookin'?
Peter: I'm going to take a rain check on the movie. This is what I get for moving to New York. And to clarify things, you're not my type. (Leaves).
Grace: Wow. That was embarrassing.
Will: Yeah. How do you feel?
Grace: What do you mean, how do I feel?
Will: Sweetie, you just got dumped.
Grace: Oh, I don't think so. You got dumped. He's clearly gay.
Karen: Sorry I'm late. My driver hit a pedestrian on 57th Street, and we had to stop and blah, blah, blah...
Grace: Oh my god! Is he ok?
Karen: Mmm, a little rattled, but he always gets like that when he hits someone.
Karen: (About her driver) Grace, he is old and sweet and helpless. I can't just fire him because he's a raging incompetent. I mean, maybe you could, but not me.
Grace: Karen, if that were true, we wouldn't be having this conversation.
Will: He can name a gay guy in one note.
This is a reference to the 70's game show Name That Tune, where in one of the segments called Bid-A-Note the contestants were given a description of a song, then they would say how many notes they would need played to identify it.
Episode Title: Yours, Mine Or Ours
This is a reference to the 1968 film "Yours, Mine and Ours," starring Lucille Ball and Henry Fonda.
Will: Thank you, Homo Wan Kenobi.
A quick stab at the sci-fi film Star Wars.
Will & Jack: Tell me he's lazy, tell me he's slow. Tell me I'm crazy, maybe I know. Can't help lovin' that man of mine.
These are lyrics from the Barbra Streisand number "Can't Help Lovin' That Man Of Mine." Although Barbara sang the song, as have many others, it's originally from the musical Showboat, written by Jerome Kern and Oscar Hammerstein II, sung by the tragic character Julie, and originally produced in 1927.
Karen: I mean, as Gandhi once said, "You're only as strong as your weakest servant." I think he said that. Or maybe it was "Wow, this sand is hot!"
Mohandas Karamchand Gandhi, more commonly known as Mahatma Gandhi, was one of the founding fathers of the modern Indian state and a powerful supporter of non-violent protest (Satyagraha) as a means of revolution.
Jack: We haven't sung a show tune since Jimmy Swaggart got caught with a hooker.
Jimmy Swaggart was a Conservative Christian Television Evangelist who had to resign from his TV ministry after being caught masturbating with a prostitute. In 1988 Jimmy Swaggart tearfully confessed to an unspecified "sin", later alleged to involve hiring prostitutes for pornographic acts.
Jack: Oh, my god. She's alive. Alive!
"It's alive! Alive!" is a famous line from the 1931 adaptation of Mary Shelly's Frankenstein.