In the 1956 film 'Forbidden Planet', what is the name of the robot?

In the 1956 film "Forbidden Planet," the robot is named Robby the Robot.

Robby is the mechanical servant of Dr. Edward Morbius, a human scientist living on the distant planet Altair IV. Morbius created and programmed him using knowledge derived from the ancient Krell civilization. Although Robby is powerful and highly advanced, he is portrayed as helpful, polite, witty, and reluctant to harm humans.

The character was a landmark in science-fiction cinema because Robby had a recognizable personality and an important role in the story, rather than functioning only as a machine or monster. His design was developed by MGM artists and is commonly associated with designer Robert Kinoshita.

Robby's behavior reflects rules resembling Isaac Asimov's Three Laws of Robotics, although the film does not formally present the laws by name. This becomes crucial near the end, when Robby refuses to attack the invisible creature known as the Monster from the Id. The original prop later appeared in other productions, including "The Invisible Boy" and episodes of "The Twilight Zone."