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When Tony Stark and Bruce Banner try to jump-start a dormant peacekeeping program called Ultron, things go horribly wrong and it's up to Earth's Mightiest Heroes to stop the villainous Ultron from enacting his terrible plans.
Director: Joss Whedon
Writers: Joss Whedon, Stan Lee (based on the Marvel comics by), 1 more credit »
Stars: Robert Downey Jr., Chris Evans, Mark Ruffalo | See full cast and crew »
