Changes

* [[Laurence Harvey]] as former Staff Sergeant Raymond Shaw, USA, the war hero brainwashed by the enemy.

* [[Laurence Harvey]] as former Staff Sergeant Raymond Shaw, USA, the war hero brainwashed by the enemy.

** James Gregory as Senator John Irkes Iselin of New York State; Shaw's stepfather and seeker of the nomination for Vice President.<ref name=Iselin>The identification of Senators Iselin and Jordan as Republicans is tentative. It is based on Raymond Shaw's identification of his first civilian employer, Holborn Gaines, as a Republican, an identification that he offers to his mother as proof that Mr. Gaines is not a Communist. Senators Iselin and Jordan constitute the New York delegation to the Senate because they clearly both reside in New York.</ref>

** James Gregory as Senator John Irkes Iselin of New York State; Shaw's stepfather and seeker of the nomination for Vice President.<ref name=Iselin>The identification of Senators Iselin and Jordan as Republicans is tentative. It is based on Raymond Shaw's identification of his first civilian employer, Holborn Gaines, as a Republican, an identification that he offers to his mother as proof that Mr. Gaines is not a Communist. Senators Iselin and Jordan constitute the New York delegation to the Senate because they clearly both reside in New York.</ref>

** [[Angela Lansbury]] as Mrs. Iselin, Raymond Shaw's mother and Senator Iselin's wife.

** [[Angela Lansbury]] as Eleanor Iselin, Raymond Shaw's mother and Senator Iselin's wife.<ref name=eleanor>The full name of Eleanor Iselin was never given in the film, but it did appear in the novel from which this film is adapted.</ref>

** Henry Silva as Chunjin, a Korean interpreter (and Communist spy).

** Henry Silva as Chunjin, a Korean interpreter (and Communist spy).