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The Neptune Factor (1973)

G | | Sci-Fi | 3 August 1973 (USA)
When an underwater ocean lab is lost in a earthquake, an advanced submarine is sent down to find it and encounters terrible danger.


Daniel Petrie


Jack DeWitt

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1 nomination. See more awards »


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Cast overview, first billed only:
Ben Gazzara ... Cmdr. Adrian Blake
Walter Pidgeon ... Dr. Samuel Andrews
Ernest Borgnine ... Chief Diver Don MacKay
Yvette Mimieux ... Dr. Leah Jansen
Donnelly Rhodes ... Diver Bob Cousins
Chris Wiggins Chris Wiggins ... Capt. Williams
Michael J. Reynolds ... Dr. Hal Hamilton
Mark Walker ... Diver Dave Moulton
Leslie Carlson ... Brigs, Triton Radioman
Stuart Gillard ... Diver Phil Bradley
Ed McGibbon Ed McGibbon ... Dr. Norton Shepherd
David Renton David Renton ... Warrant Officer
Joan Gregson ... Dobson
David Yorston David Yorston ... Diver Stephens
Ken Pogue ... Diver Thomas (as Kenneth Pogue)


Aboard the R/V Triton, the Project Neptune team is doing oceanographic research. Director Andrews is trying to keep the research going in spite of opposition from Foundation Head Sheppard. Below on the ocean floor, in the Sealab, the team led by Hamilton is about to return to the surface when the Sealab is ripped loose from it's moorings and sent careening into a trench. Trapped too deep for divers, the only chance is rescue by a new US Navy mini-sub, piloted by the arrogant Cdr Blake USN. Blake, Chief Diver MacKay, Diver Cousins & Dr. Jansen (Hamilton's fiance) dive in the mini sub to attempt the rescue of the trapped Hamilton & crew. Written by Robb Mavins <rmavins@mb.sympatico.ca>

Plot Summary | Add Synopsis






G | See all certifications »






Release Date:

3 August 1973 (USA) See more »

Also Known As:

Conquest of the Deeps See more »

Filming Locations:

Cayman Islands See more »


Box Office


CAD 2,500,000 (estimated)
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Company Credits

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Technical Specs


Sound Mix:




Aspect Ratio:

2.35 : 1
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Did You Know?


More than forty technical consultants from the Canadian Armed Forces, the Bedford Institute of Oceanography, and the Royal Ontario Museum as well as representatives from industries involved in various aspects of the undersea world participated in the making of this film. See more »


A black-suited diver is briefly shown assisting 2 others to depart from the lab in a mini-sub. He's not one of the characters, and disappears from the scene when the next diver (Yvette Mimieux) exits the lab to follow the sub. See more »


Dr. Leah Jansen: And those jawfish! The ones I've seen have been only two inches long. Look at them!
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User Reviews

Stuck in a fishbowl.
4 April 2010 | by lost-in-limboSee all my reviews

The mystery, the excitement, the danger… ah the boredom of getting wet. The Canadian production "The Neptune Factor" is a typical underwater disaster adventure that rarely gets going and when it does it's quite an unremarkable and unimaginative foray… in a cheaply presented magnified fish tank. The problem is like a lot of other reviewers mentioned, is that nothing much happens. A lot of peering and ponderous talking… with little interest to it all. A group of American scientists are conducting an experiment involving underwater living until an earthquake occurs causing a research facility to fall into the abyss. They only have so many hours before they're out of oxygen, so a crew in a mini submarine are sent down to find them despite the risks of more aftershocks. Really the taut situation that unfolds should sell it in a threatening, pressure-induced manner, but instead we get a padded out story with a very limp rhythm. No urgency left it with any sustained suspense lingering only on stolid dramas of a threadbare narrative and static direction. There's a few dazzling glimpses when the crew is exploring the murky abyss, but the model sub and the overblown sea life didn't create any sort of thrills and when it tried it was quite laughable in its execution. The performances don't fair any better, despite the best efforts of Ernest Borgnine and Walter Pidgeon. As for Ben Gazzera and Yvette Mimieux, they come across very bland. Composer Lalo Schifran contributes the score. Established, but too plain to be fun.

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