‘Trapped underwater… with time running out.’ Charlton Heston stars in director David Greene’s sombre 1978 action adventure disaster movie as a US Navy Captain called Paul Blanchard, whose nuclear submarine The USS Neptune has collided with a Norwegian cargo freighter.

The Neptune has sunk off the coast of Connecticut and is stuck on an underwater ocean ledge but is falling off the ridge. The question is, will the rescue operation be in time?

David Carradine plays the US Navy officer misfit Captain Gates, who runs the small experimental submersible Snark which is brought in as the only hope to reach the nuclear submarine for a rescue.

Disaster movie veteran Heston brings his solid persona of authority and respectability, Stacy Keach plays Captain Bennett, the commander of the US Navy r...