Forbidden Planet - Production

Production

Id Monster – plaster cast of footprint, and outlined in electric field and blaster rays

The screen story by Irving Block and Allen Adler, written in 1952, was originally titled Fatal Planet. The later screenplay draft by Cyril Hume renamed the film Forbidden Planet, because this was believed to have greater box-office appeal. Block and Adler's drama took place in the year 1976 on the planet Mercury. An Earth expedition headed by John Grant was sent to the planet to retrieve Dr. Adams and his daughter Dorianne, who have been stranded there for twenty years. From then on, its plot is roughly the same as that of the completed film, though Grant is able to rescue both Adams and his daughter and escape the invisible monster stalking them.

The film sets were constructed on a Metro Goldwyn Mayer (MGM) sound stage at its Culver City film lot and were designed by Cedric Gibbons and Arthur Longeran. The film was shot entirely indoors, with all the Altair IV exterior scenes simulated using sets, visual effects, and matte paintings.

A full-size mock-up of roughly three-quarters of the C57-D starship was built to suggest its full width of 170 ft (51 m). The ship was surrounded by a huge, painted cyclorama featuring the desert landscape of Altair IV; this one set took up all of the available space in one of the Culver City sound stages.

Forbidden Planet is the first science fiction film in which humans are depicted traveling in a starship of their own construction.

Later, C57-D models, special effects shots, and the full-size set details were reused in several different episodes of the television series The Twilight Zone, which were filmed by CBS at the same MGM studio location in Culver City.

At a cost of roughly $125,000, Robby the Robot was very expensive for a single film prop at this time. Both the electrically controlled passenger vehicle driven by Robby and the truck/tractor-crane off-loaded from the C57-D starship were also constructed specially for this film. Robby the Robot later starred in the science fiction film The Invisible Boy and appeared in many TV series and films that followed; like the C57-D, Robby (and his passenger vehicle) appeared in various episodes of CBS' The Twilight Zone, usually slightly modified for each appearance.

The animated sequences of Forbidden Planet, especially the attack of the "Id Monster", were created by the veteran animator Joshua Meador, who was loaned out to MGM by Walt Disney Pictures. According to a "Behind the Scenes" featurette on the film's DVD, a close look at the creature shows it to have a small goatee beard, suggesting its connection to Dr. Morbius, the only character with this physical feature; the bellowing, now visible Id monster, caught in the crewman's high-energy beams during the attack, is a direct reference to and visual pun on MGM's familiar roaring mascot Leo the Lion, seen at the very beginning of Forbidden Planet and the studio's other films of the era.