When Tony Stark tries to jumpstart a dormant peacekeeping program, things go awry and it is up to the Avengers to stop the villainous Ultron from enacting his terrible plans.

Director: Joss Whedon
Writers: Joss Whedon, Stan Lee (comic book).
Stars: Robert Downey Jr., Chris Evans, Mark Ruffalo, Scarlett Johansson, Chris Hemsworth