33 user 24 critic

The Neptune Factor (1973)

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

On Disc

at Amazon

1 nomination. See more awards »


Learn more

More Like This 

Marooned (1969)
Adventure | Drama | Sci-Fi
    1 2 3 4 5 6 7 8 9 10 5.9/10 X  

Three American astronauts are stranded in space when their retros won't fire. Can they be rescued before their oxygen runs out?

Director: John Sturges
Stars: Gregory Peck, Richard Crenna, David Janssen
Adventure | Drama | Sci-Fi
    1 2 3 4 5 6 7 8 9 10 6.3/10 X  

After their latest rocket fails, Dr. Charles Cargraves and retired General Thayer have to start over again. This time, Gen. Thayer approaches Jim Barnes, the head of his own aviation ... See full summary »

Director: Irving Pichel
Stars: John Archer, Warner Anderson, Tom Powers
Night People (1954)
Adventure | Crime | Mystery
    1 2 3 4 5 6 7 8 9 10 6.5/10 X  

During the Cold War, an American soldier is abducted in West Berlin, sparking a recovery effort led by Colonel Steve Van Dyke.

Director: Nunnally Johnson
Stars: Gregory Peck, Broderick Crawford, Anita Björk
Action | Drama | Thriller
    1 2 3 4 5 6 7 8 9 10 4.5/10 X  

American based Federation World Airlines has just acquired a Concorde jet, which will make its inaugural commercial flight from Washington, D.C. to Paris, and then to Moscow as a goodwill ... See full summary »

Director: David Lowell Rich
Stars: Alain Delon, Susan Blakely, Robert Wagner
Action | Adventure | Fantasy
    1 2 3 4 5 6 7 8 9 10 6.4/10 X  

The first U.S. spaceship to Venus crash-lands off the coast of Sicily on its return trip. A dangerous, lizard-like creature comes with it and quickly grows gigantic.

Director: Nathan Juran
Stars: William Hopper, Joan Taylor, Thomas Browne Henry
    1 2 3 4 5 6 7 8 9 10 7.1/10 X  

Ukrainian Archbishop Kiril Lakota is set free after twenty years as a political prisoner in Siberia. He is brought to Rome by Father David Telemond, a troubled young priest who befriends ... See full summary »

Director: Michael Anderson
Stars: Anthony Quinn, Laurence Olivier, Oskar Werner
Horror | Sci-Fi
    1 2 3 4 5 6 7 8 9 10 5.8/10 X  

A scientist captures the Creature and turns him into an air-breather, only for him to escape and start killing.

Director: John Sherwood
Stars: Jeff Morrow, Rex Reason, Leigh Snowden
Horror | Sci-Fi
    1 2 3 4 5 6 7 8 9 10 4.8/10 X  

Scientists become trapped on a shrinking island with intelligent, murderous giant crabs.

Director: Roger Corman
Stars: Richard Garland, Pamela Duncan, Russell Johnson
Fantasy | Horror | Sci-Fi
    1 2 3 4 5 6 7 8 9 10 4.5/10 X  

Global panic ensues when it is revealed that a mysterious UFO is actually a giant bird that flies at supersonic speed and has no regard for life or architecture.

Director: Fred F. Sears
Stars: Jeff Morrow, Mara Corday, Morris Ankrum
Horror | Sci-Fi
    1 2 3 4 5 6 7 8 9 10 5.5/10 X  

A boy tries to stop aliens who have taken over his town and are attempting to brainwash its inhabitants.

Director: Tobe Hooper
Stars: Karen Black, Hunter Carson, Timothy Bottoms
Indian Summer (1993)
Comedy | Drama | Romance
    1 2 3 4 5 6 7 8 9 10 6.5/10 X  

Seven friends reunite for a week-long reunion at a summer camp in Ontario they used to attend as children which is now threatened with being closed down.

Director: Mike Binder
Stars: Alan Arkin, Matt Craven, Diane Lane
Adventure | Sci-Fi
    1 2 3 4 5 6 7 8 9 10 6.5/10 X  

Stranded on Mars with only a monkey as a companion, an astronaut must figure out how to find oxygen, water, and food on the lifeless planet.

Director: Byron Haskin
Stars: Paul Mantee, Victor Lundin, Adam West


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


The most fantastic undersea odyssey ever filmed. See more »


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


CAD2,500,000 (estimated)
See more on IMDbPro »

Company Credits

Show more on IMDbPro »

Technical Specs


Sound Mix:




Aspect Ratio:

2.35 : 1
See full technical specs »

Did You Know?


Over 2,000 sea animals imported from the waters adjacent to more than fifty countries were trained to act on cue in this movie. See more »


When Dr. Leah Jansen is suffering the effects from going too deep we hear her talking through the ship's speakers. However when Cousins and MacKay rescue her we see her scuba gear has a standard mouthpiece and her face mask only covers her eyes and nose, all of which would prevent her from talking to the ship. See more »


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

Frequently Asked Questions

See more »

User Reviews

It could have been so much better
17 September 2004 | by JHC3See all my reviews

Oceanlab is an experimental station built atop an undersea mountain in the

North Atlantic somewhere off the coast of Canada. An earthquake strikes,

causing the lab to plunge into an unexplored abyss. Three men are trapped

aboard and they have only seven days of oxygen remaining.

After five days, the Oceanlab team is able to call in a retired naval officer, Commander Blake (Gazzara). Using his deep sea submersible "Neptune II," it

is hoped he can locate and rescue the men before they suffocate. The hope is a slim one; all contact with the lab was lost when the earthquake occurred. The submersible must face the hazards of deep sea travel, aftershocks, and some

very unexpected discoveries on the ocean floor.

The cast is unusually strong with Ernest Borgnine, Donnelly Rhodes, Yvette

Mimieux, and Walter Pigeon all putting in good performances. The special

effects are limited to model work for undersea shots, but the models are decent enough given the year of release. The film starts out well with the opening

score being particularly noteworthy. Unfortunately, once the submersible gets in the water, the viewer is taken for a rather dull ride for the bulk of the film. Suspense is largely absent. In lieu of pacing, the filmmakers subject the viewer to a lot of stock fish footage. While this was decent enough, it was overused and probably better suited to a nature documentary. Ultimately, the screenplay

needed some serious work. There is insufficient substance to make this work

even as a one hour Twilight Zone or Outer Limits episode. "The Neptune

Factor" otherwise possessed all of the elements necessary to make a successful and compelling adventure film.

20 of 25 people found this review helpful.  Was this review helpful to you? | Report this
Review this title | See all 33 user reviews »

Contribute to This Page

Stream Trending Movies With Prime Video

Enjoy a night in with these popular movies available to stream now with Prime Video.

Start your free trial

Recently Viewed