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?
Plot hole: Krell doorways and equipment suggest they are short, wide and 2-3 times larger than a human. Yet the shuttle pod the Commander, Doctor and Morbius ride in is designed for human size beings.
Plot hole: Morbius says no physical representation of the Krell remains. Yet later he shows the Commander a screen that contains the total sum of the Krell's scientific knowledge. So didn't the Krell study their own biology?
Answer: This is a lightweight, unsophisticated 1950s sci-fi movie with little thought to scientific accuracy. Space travel wasn't possible at this time and most people had little knowledge of what that would entail. Screenwriters just "improvised." The movie was meant as pure entertainment with a humor-infused plot. The "cook" is just a comic-relief character.
raywest ★