Edmond O'Brien as Capt. Matt Reardon

Barry Sullivan as Cmdr. Bert Thompson

Jocelyn Brando as Lt. Ellen Wilkins

Leo Gordon as Sgt. Hank Janowicz

Lee Strasberg as Patterson

Richard Loo as Chang Sung

Dayton Lummis as Dr. Masterson

Leon Askin as Wu King

Dabbs Greer as Galuppo

Alvy Moore as Carlson

Wong Artarne as Ens. Wong

Philip Ahn as Adm. Amara

James Anderson as Cpl. Walters (uncredited)

George Chan as Old Chinese Patriarch (uncredited)

David Chow as Merchant (uncredited)

Kei Thin Chung as Chinese Runner (uncredited)

Dick Crockett as Chief Waggner (uncredited)

Todd Karns as Lt. March (uncredited)

Eddie Lee as Guerrilla (uncredited)

Freddie Letuli as Bit Role (uncredited)

Edo Mita as Japanese Officer (uncredited)

Rollin Moriyama as Japanese Marine Officer (uncredited)

Lane Nakano as Japanese Sniper (uncredited)

Walter Ng as Guerrilla Horseman (uncredited)