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.
Captain America, Iron Man, Thor and the rest are back in a giant superhero adventure that's sometimes daffy, occasionally baffling, surprisingly touching and even romantic with one kinetic thrill after another. It earns a place of high ranking in the Marvel Universe. - Three and a half stars