The July Fourth weekend explodes with the arrival of 'Transformers: Dark of the Moon,' thrusting Shia LaBeouf back in the middle of more giant robot chaos, courtesy of director Michael Bay. After a 40-year-old secret is revealed, Shia, new onscreen girlfriend Rosie Huntington-Whiteley, Josh Duhamel and Tyrese Gibson face an alien invasion which may mean the end of Earth as we know it. As they wage war on the streets of Chicago, can the Autobots save us from the evil Decepticons? Patrick Dempsey, John Malkovich, Frances McDormand and John Turturro also star.