Continuity mistake: During the alien's assault on the ship, one crewman is seen near the spaceship's stairs firing a weapon. However, the weapon is pointed at a forty-five to sixty degree angle - at this angle, he would hit the bottom of the ship, not the alien that is much farther out.

Forbidden Planet (1956)
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Directed by: Fred M. Wilcox
Starring: Leslie Nielsen, Walter Pidgeon, Anne Francis, Warren Stevens
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Lt. 'Doc' Ostrow: The total potential here must be nothing less than astronomical.
Dr. Morbius: Nothing less. The number 10 raised almost literally to the power of infinity.
Trivia: To save money, many of the set backdrops in this film were recycled from The Wizard of Oz. This is most obvious in Morbius' garden.
Question: Can someone explain how all the special effects were done, such as the electronic blasters rays, and the sound effects? As the film was from 1956 there were no electronic keyboards then and the sounds are very futuristic.





Answer: Many of the sound effects use an electictronic instrument called a theremin which was invented in 1919. You may hear it used more musically in The Beach Boys song "Good Vibrations." The visual effects would have been animated composites as used in Star Wars and Ghostbusters.
Myridon