James T. Kirk made more than a few enemies during his time aboard the Enterprise, but the most menacing (and eloquent) may well have been Ricardo Montalban's Khan-a superhuman conqueror exiled by Kirk in the original Star Trek series. Fifteen years later, Khan's thirst for vengeance is palpable and his pecs are impeccable. It's up to Kirk, Spock, Sulu and the rest of the crew (including a Vulcan Kirstie Alley) to protect the galaxy from this latter day Captain Ahab, or else spend the rest of their days shouting "Khaaaaaaaaaaaaaan!"