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
as Klaatu
Jennifer Connelly
as Helen Benson
Jaden Smith
as Jacob Benson
Jon Hamm
as Michael Granier
Kathy Bates
as Regina Jackson
John Cleese
as Professor Barnhardt
Kyle Chandler
as John Driscoll
Robert Knepper
as Colonel
Brandon T. Jackson
as Target Tech
James Hong
as Mr. Wu
Jake McLaughlin
as Soldier
John Rothman
as Dr. Myron
