Voyage to the Bottom of the Sea (1961) – So, let me see if I can understand the premise. The Van Allen Belt, a ring of unknown gas around the Earth, catches fire, and the only way to fix it is to take a submarine to the Mariana Trench and fire a missile up in order to overload the Van Allen Belt and explode it outward. I got that right, right?
I’m gonna save you all some trouble. Joan Fontaine gets a fatal dose of radiation, is revealed as the saboteur, and is eaten by a shark all in a thirty-second span.