A representative of an alien race that went through drastic evolution to survive its own climate change, Klaatu comes to Earth to assess whether humanity can prevent the environmental damage they have inflicted on their own planet. When barred from speaking to the United Nations, he decides humankind shall be exterminated so the planet can survive.
Keanu Reeves
Klaatu
Jennifer Connelly
Helen Benson
Jaden Smith
Jacob Benson
Jon Hamm
Michael Granier
Kathy Bates
Regina Jackson
John Cleese
Professor Barnhardt
Kyle Chandler
John Driscoll
Robert Knepper
Colonel
