House says "Hello, my pretties."
House quotes the "Casablanca" goodbye scene ("Maybe not today, maybe not tomorrow...) extensively when he's trying to get rid of his 17-year old stalker.
Wilson has a "Touch of Evil" poster in his office.
Wilson has a "Vertigo" poster in his office.
House shouts "Attica! Attica!" etc at Cuddy when she refuses to return his old carpet.
House says "This is your backyard--you may know it as Mel's Diner."
House plays the original Frogger on a PSP
the PSP game that Adam plays several times