In the 1956 film, Robby serves the mysterious Dr. Morbius on the planet Altair IV and is programmed to obey Isaac Asimov's Three Laws of Robotics, the first of which is to not harm humans. The film is seen as a sci-fi version of Shakespeare's The Tempest, with Robby acting as the enslaved spirit Ariel to Prospero. Robby had a mechanical voice and quite the dry artificial intelligence wit. His popularity extended to appearances in many other films and TV shows after Forbidden Planet.
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