Memorable ''Will & Grace'' guest stars: James Earl Jones
In what may have been his easiest acting gig since ''This is CNN,'' the booming-voiced actor plays himself in a 2003 episode. In search of inspiration, he takes Jack's acting course and gets in touch with his feminine side. (Priceless moment: Jones performs a stage exercise as Carrie from Sex in the City.) Fortunately, Jones eventually comes to his senses and quits the class; after all, he remembers, ''I've got Darth Vader money.''