Frank Sinatra

Character: Capt./Maj. Bennett Marco

Laurence Harvey

Character: Raymond Shaw

Angela Lansbury

Character: Mrs. Iselin

Janet Leigh

Character: Eugenie Rose Chaney

James Gregory

Character: Sen. John Yerkes Iselin

Henry Silva

Character: Chunjin

Leslie Parrish

Character: Jocelyn Jordan

John McGiver

Character: Sen. Thomas Jordan

Khigh Dhiegh

Character: Dr. Yen Lo

James Edwards

Character: Cpl. Allen Melvin

Douglas Henderson

Character: Col. Milt

Albert Paulsen

Character: Zilkov

Barry Kelley

Character: Secretary of Defense

Lloyd Corrigan

Character: Holborn Gaines

Madame Spivy

Character: Female Berezovo

Bess Flowers

Character: Gomel's Lady Counterpart (uncredited)

Leoda Richards

Character: Woman at Press Confrence (uncredited)

Reggie Nalder

Character: Gomel (uncredited)

Colin Kenny

Character: Senator (uncredited)

Bert Stevens

Character: Officer

Arthur Tovey

Character: Second Reporter

Paul Frees

Character: Narrator (voice)

Whit Bissell

Character: Medical Officer

James Yagi

Character: Chinese Officer (uncredited)

Tom Lowell

Character: Pvt. Bobby Lembeck (uncredited)

Joe Adams

Character: Psychiatrist

Merritt Bohn

Character: Jilly

Robert Riordan

Character: Benjamin K. Arthur

Raoul Freeman

Character: Reporter (uncredited)

Rudy Germane

Character: Delegate (uncredited)

Herschel Graham

Character: Delegate (uncredited)

Stuart Hall

Character: Reporter (uncredited)