Glenn Ford

Character: Lt. Cmdr. Barney Doyle

Ernest Borgnine

Character: Lt. Archer 'Archie' Sloan

Diane Brewster

Character: Jane Doyle

Dean Jones

Character: Lt. Jake 'Fuzz' Foley

L.Q. Jones

Character: 'Hash' Benson

Philip Ober

Character: Adm. Samuel Setton

Richard Carlyle

Character: Cmdr. Don Adams

Fredd Wayne

Character: Orville 'Goldy' Goldstein

Don Keefer

Character: Ens. Ron Milligan

Robert Hardy

Character: Lt. Redley

Paul Picerni

Character: Lt. Burt Fisher

Kimberly Beck

Character: Dede Doyle

Oliver Cross

Character: Nightclub Patron

Howard Dayton

Character: Walker

Sam Edwards

Character: Sub Radio Operator

Biff Elliot

Character: Lt. Paul Buckeye

Al Freeman Jr.

Character: Sam Baker

Frank Gorshin

Character: Sub Crewman

Norman Grabowski

Character: Sub Crewman

Louis Quinn

Character: Crewman Metcalf

William Schallert

Character: Captain of the Bluefin

Frank London

Character: Al Garrity

Karl Lukas

Character: Hallert