Here are a few things to look or listen for when you're watching "Revenge of the Sith":
George Lucas in blue-face at the opera as Baron Papanoida.
A hot rod driven by Sen. Bail Organa (Jimmy Smits). It's based on the front of a Tucker that is parked at Skywalker Ranch. "George is an avid car fan, and when they were designing that car, he actually sent them over to the garage to take pictures of the Tucker," says Rob Coleman, animation director on the film.
A duel between Obi-Wan and Anakin marks the first (and only) time in a "Star Wars" movie that two characters fight each other using the same color light-saber.
A Peter Cushing look-alike. At the end of the film, there's an actor who bears a strong resemblance to the late actor who played Grand Moff Tarkin, the villain in the first "Star Wars" movie.
Anakin's first mechanical-sounding breath as Darth Vader (toward the end of the movie).
Padme's hairstyle, now the bun style like Princess Leia in the original "Star Wars."
Leia's blockade runner, which is attacked at the beginning of "Star Wars."
Jett Lucas, the director's son, as Zett Jukassa, a Jedi.
Jar Jar Binks, with his mouth closed.
Source: The Los Angeles Daily News