Glenn Ford as Lt. Cmdr. Barney Doyle

Ernest Borgnine as Lt. Archer 'Archie' Sloan

Diane Brewster as Jane Doyle

Dean Jones as Lt. Jake 'Fuzz' Foley

L.Q. Jones as 'Hash' Benson

Philip Ober as Adm. Samuel Setton

Richard Carlyle as Cmdr. Don Adams

Fredd Wayne as Orville 'Goldy' Goldstein

Don Keefer as Ens. Ron Milligan

Robert Hardy as Lt. Redley

Paul Picerni as Lt. Burt Fisher

Kimberly Beck as Dede Doyle

Oliver Cross as Nightclub Patron

Howard Dayton as Walker

Sam Edwards as Sub Radio Operator

Biff Elliot as Lt. Paul Buckeye

Al Freeman Jr. as Sam Baker

Frank Gorshin as Sub Crewman

Norman Grabowski as Sub Crewman

Louis Quinn as Crewman Metcalf

William Schallert as Captain of the Bluefin

Frank London as Al Garrity

Karl Lukas as Hallert