Plot hole: At the end of the movie, as Morbius lay dying, he had Commander Adams press a lever that irreversibly set the countdown for the planet's destruction. Morbius said earlier in the movie that they were in a learning laboratory for the Krell children. Why would the Krell have given their children access to something so dangerous to begin with, in a place where the switch didn't belong, and without any safety precautions to prevent an accidental countdown?

Forbidden Planet (1956)
1 mistake since 6 Mar '25, 20:09
Directed by: Fred M. Wilcox
Starring: Leslie Nielsen, Walter Pidgeon, Anne Francis, Warren Stevens
Cook: Another one of them new worlds. No beer, no women, no pool parlors, nothin'. Nothin' to do but throw rocks at tin cans, and we gotta bring our own tin cans.
More trivia for Forbidden Planet
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.
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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