Rock Hudson

Cdr. James Ferraday

Ernest Borgnine

Boris Vaslov

Patrick McGoohan

David Jones

Jim Brown

Capt. Leslie Anders

Tony Bill

Lt. Russell Walker

Alf Kjellin

Col. Ostrovsky

Gerald S. O'Loughlin

Lt. Cdr. Bob Raeburn

Ted Hartley

Lt. Jonathan Hansen

Murray Rose

Lt. George Mills

Jonathan Goldsmith

Russian Aide

Sherwood Price

Lt. Edgar Hackett

John Orchard

Survivor

Ron Masak

Paul Zabrinczski

Ronnie Rondell Jr.

Lyle Nichols

Lloyd Haynes

Webson

William O'Connell

Survivor

Jed Allan

Peter Costigan

Buddy Joe Hooker

Hill

Lloyd Nolan

Admiral Garvey

Jim Goodwin

Survivor

Budd Albright

Seaman with torpedo accident (uncredited)

Louie Elias

Maneuver Sergeant (uncredited)

James Jeter

2nd Barman (uncredited)

Elliott Sullivan

Bartender (uncredited)