Best way of describing this movie is it's a cross between 'Crimson Tide' and 'The Day the Earth caught fire', though not as good as either. A very good cast with Walter Pidgeon as the eccentric and Uber-intelligent admiral, Joan Fontaine, Peter Lorre, Barbara Eden and Frankie Avalon. It's fun and better than some of the early 60's sci-fi, though nothing special.
Review of Voyage to the Bottom of the Sea
