Shia LaBeouf returns as Sam Witwicky in the third installment of Michael Bay's trilogy about the giant robots that will be either Earth's salvation or destruction. This time, Sam squares off against Shockwave, leader of the evil Decepticons. Sam also has a new girlfriend (Rosie Huntington-Whiteley) but can't focus on love when the space race between the United States and Russia heats up with interference from Shockwave and his minions.