Academy Award nominee James Caan commands a covert naval operation in this riveting drama inspired by an amazing true story discovered in declassified British War Office files. With "first-class underwater photography" (Variety) and taut suspense, this tale of heroism paved the way for films like The Hunt for Red October. Commander Bolton (Caan) has lost his submarine, the Gauntlet, in a sea battle with the Nazis in 1943. Although the survivors still blame him, he's cleared of charges and assigned to lead a top-secret training program with three experimental miniature X-1 subs, each manned by a crew of only four. Their mission: to sink the mighty battleship Lindendorf - the same ship that destroyed the Gauntlet!
- Cinematographer: Lionel Banes
- Cinematographer: Paul Beeson
- Production Designer: William C. Andrews
- Composer: Ron Goodwin
- Story by: John C. Champion
- Producer: John G. Champion
- Screenplay: Guy Elmes
- Director: William Graham
- Producer: Ted Lloyd
- Story by: Edmund H. North
- Editor: John S. Smith
- Screenplay: Donald S. Sanford
