In the movie, Klaatu and his robot, Gort, come to Earth from a peaceful civilization to deliver a simple message : don’t try that violence stuff with us, because if you do, we’ll wipe away Earth quicker than you can say Roswell, New Mexico.
Fox contract player Patricia Neal was signed to play Helen Benson , the Earthling that Klaatu / Mr. Carpenter relates to the closest. Her son Bobby was played by long-time child actor Billy Gray. Perfectly cast as Professor Barnhardt (obviously patterned after Albert Einstein), was character actor Sam Jaffe.
Klaatu’s action is taken as an act of war. Betrayed by Mrs. Benson’s suitor, he is fatally shot by the U.S. Army; whereupon Mrs. Benson, at his behest, delivers the message ” Klaatu barada nikto!” barely in time to save her own life.
The Day the Earth Stood Still | Netflix .
“Klaatu barada nikto” is a phrase that originated in the 1951 science fiction film The Day the Earth Stood Still. The humanoid alien protagonist of the film, Klaatu (Michael Rennie), instructs Helen Benson (Patricia Neal) that if any harm befalls him, she must say the phrase to the robot Gort (Lockard Martin).