This is a truly incredible film - by which I mean it isn't the least bit credible. Anyone who knows anything about diving or oceanography (or for that matter, science in general) will howl at the dozens of mistakes and improbabilities.
In a small, Beatles-style yellow submarine that seems barely big enough for 4 testosterone-fuelled men's men and one pretty woman, our heroes are required to travel around the ENTIRE WORLD and place 50 earthquake sensors at strategic points on the seafloor to create a warning system of the impending destruction of the earth by seismic forces! They manage to do this in just one month! The sensors are "anchored" to the seabed by making them explode!
The first sensor is placed at the bottom of a trench 6 miles deep. The guy (for some reason I've forgotten) actually leaves the sub in his diving suit! At this depth, his entire body would implode instantly from the pressure. Incredibly, the seabed at this depth is light and swarming with fish! In reality, it would be totally dark and devoid of life.
At one point, they are in a very rich area of ocean, where the "minestrone" of available food biomass attracts millions of fish. We get the warning that "little fish attract big fish", so we expect maybe a 20-foot shark... But no, the sub is attacked by a mutant conger eel that must be at least 100 feet long! It totally dwarfs the sub. This is so ridiculous, as you can tell from the way it moves it's just a very tiny eel in a tank. In the exterior shots of the sub, it's so obviously just a small lightweight model in a fishtank. The special effects budget of this movie must have been nil.
The best line is this movie is when Shirley Eaton's character says of the female sex, "We have men to thank for our freedom, but sometimes we don't know how to handle it!" I think this was in response to the suggestion that women lead men on sexually, sometimes to their downfall. Well, she may be a scientist, but at least she isn't some crazy feminist! ;-) This film is so dated in general, it's amazing it was made as recently as 1966! There's a palpable mid-to-late 50s feel. The woman is there for the sole purpose of creating tension with the men who lust after her and fight among themselves. In fact, most of the movie's drama comes from the effect this bimbo scientist has on her crewmates' testosterone levels. She is actually wearing stiletto heels when she boards the submarine.
The end of the movie is the most hilarious part. The sub is half-buried by a volcanic rockfall, so the captain suggests blowing the buried half off with dynamite to free them! They all accept this rational-sounding theory without complaint. Dozens of sticks of dynamite and plastique are wired INSIDE the sub. They blow the back half of the thing clean off and stay safely sealed in the bridge compartment. How ridiculous! But the front of the sub is still not free! So Lloyd Bridges must venture outside and burn through what looks like a 6-inch cable using a flare! They have to "equalize the pressure" inside the half-destroyed sub by opening the hatch, while trying to prevent too much water rushing in! They're running out of air fast, yet deem it sensible to waste bottled O2 on the pet guineapigs.
The crew take about a minute to return from the seabed to the surface. Conveniently enough, there's a chopper already there to rescue them! The joy that other viewers must have experienced (in realizing this film was finally over and they could do something worthwhile instead) was not shared by me. I realized that, with such a rapid ascent and no decompression chamber onboard the chopper, they would all certainly die an agonizing death from decompression sickness. Ah well.
The movie totally lacks suspense or thrills, but is mildly enjoyable for its unintended humorousness. David McCallum's performance as the menacing and creepy blonde European type you can never trust is, as usual, entertaining.
