An earthquake under the ocean floor hits a lab on the seabed. As a result, it's umbilical cord to the surface ship is severed and the lab tossed over a sheer underwater cliff. Now it is so deep that conventional divers cannot reach it, so the only hope is a deep water submersible, the Neptune.

Despite the film being about an ocean disaster, it's amazing just how static and dull the movie is. I think the main problem is pacing...not acting, as the actors are generally a very accomplished group of professionals. Too often, the director chose to portray the film in the least exciting manner....and I had to really struggle to pay attention or even to care.

By the way, although I don't recommend anyone see this movie, scuba divers might enjoy watching some of the diving sequences...especially when the DIve Master is thrashing about in the water like he just got his certification yesterday!

Effects are not something you should look out for in this movie. Or be excited about them. As I think another reviewer said (aptly) in his summary line: stuck in a fishbowl. And when you combine that with the pacing of the movie (of a snail),you could arguev ery well that this is not really something worthy to watch for you at all.

But since I am mostly being kind when rating and reviewing, I think there are some merits here beyond all that. You have to have patience for sure. You also maybe need to know some of the actors too. Although I reckon they can convince you with their charisma even if you don't know them. The already mentioned effects may remind some of other creature features - from way before this was shot. Still they can work if you don't mind them too much

The Neptune Factor deals with some scientists who live and work out of an undersea lab in the Atlantic Ocean. One fine day while their bosses, Walter Pidgeon, Yvette Mimieux, and Ernest Borgnine are up top, an earthquake occurs and the lab topples over into an underwater crevice.

Though an atomic power submarine could stay down there indefinitely the problem is that crevice is way too small for one of those big boys. A smaller type submarine able to withstand the pressures of the very deep is needed and that's where Ben Gazzara and his ship the Neptune come in.

As disaster films go The Neptune Factor is small potatoes special effects wise. It's a Canadian production and I've seen Hollywood come up with worse films spending a ton more money than was done here.

The special effects such as they are, are merely movie films of some ordinary species of marine life blown up several times their size, because these are the creatures the crew finds down at depths that man hasn't been before. It's beautiful undersea photography just like a trip to Marineland.

It's a no frills production, no subplots of any kind, no social interaction of any kind with the crew, just do the mission and go home. That's why it was given a G rating when first released.

If you love Jacques Cousteau, you'll love this film.