Evelyn mentions the name of the restaurant where she made reservations as Le Pissoir. A pissoir is a French outdoor public urinal.
While commonly mispronounced as "Porsh" (as Charlie mispronounced it), Alan is correct. The correct way to pronounce Porsche is "Porsha" but although it is correct, it's often seen as pretentious to pronounce it that way.
Charlie Sheen starred in the 1987 crime drama film "No Man's Land" as a rich car thief who only steals Porsches.
Episode title spoken by Alan to Trudy (Chloe Webb).
Charlie comments at one stage, "I love the smell of brimstone in the morning". This is a reference to the phrase, "I love the smell of napalm in the morning...", spoken by Robert Duvall in Apocalypse Now (1979), which starred Charlie Sheen's father, Martin Sheen.