Dive deep into danger with The Neptune Factor (1973), a thrilling underwater sci-fi adventure starring Ben Gazzara, Walter Pidgeon, Yvette Mimieux, and Ernest Borgnine. Watch the full film now!br br The Neptune Factor (1973), directed by Daniel Petrie, is a sci-fi adventure thriller that plunges into the mysteries of the ocean depths. When an underwater research facility is lost after a violent earthquake, a team led by Cmdr. Adrian Blake (Ben Gazzara) must embark on a daring rescue mission aboard the experimental submarine Neptune.