Ripley and The Terminator (never mind Superman) are in the running. And while the odds might be against the scifi heroes, just because they're outnumbered, doesn't mean they're underdogs. What chance does a supercop like Dirty Harry stand against a superhero like the Man of Steel? Check out AMC's Greatest Movie Heroes Tournament and cast your vote for your favorite. Then enter the sweepstakes for a chance to win $5000 for yourself and another $5000 for your favorite charity. A new round begins each Friday this month. Make sure to check the tournament schedule for the opening and closing dates of each round.