The mansion that Arthur moves into is the same mansion the Banks family lives in on the NBC sitcom 'The Fresh Prince of Bel Air' (1990-1996), which starred Will Smith, who worked with Kevin James in the movie "Hitch" (2005).
When Lainie Kazan says she's Esther Levine from Brooklyn, Lainie Kazan was born Lainie Levine in Brooklyn.
Ava St. Clair tells Arthur that he is the wind beneath her wings. Lainie Kazan played CeCe Bloom's mother (Bette Midler's character) in Beaches where that song, and phrase is most familiar.
Manhattan Project was the code name for the making of the first atomic bomb.
Final appearance of recurring character George Barksdale (played by Gerry Black).