Keanu Reeves comes in peace as Klaatu, an extraterrestrial envoy sent to stop humankind from destroying the planet. But the hostile reception he receives has dire consequences – especially for those who cross his gigantic robotic bodyguard Gort... Jennifer Connelly is the widowed scientist who helps his cause and Jaden ‘son of Will’ Smith is the stepson who doesn’t, but the apocalyptic effects sweep all before them in Scott Derrickson's eco-centric update of the 1951 sci-fi classic.