Forbidden planet poster

Forbidden Planet is a 1956 science fiction film about the mission of the crew of the United Planets Cruiser C-57d to the planet Altair 4. In some ways, it directly influenced Lost In Space—with Robby the Robot resembling the Robot and the C-57d resembling the Jupiter 2. Forbidden Planet's plot, however, more resembled the original concept for Star Trek than it did Lost in Space. It was also the first appearance of Robby the Robot who would later make two appearances on Lost in Space.