* [[Lawrence Harvey]] as former [[Staff Sergeant]] Raymond Shaw, USA, the chief suspect.
* [[Lawrence Harvey]] as former [[Staff Sergeant]] Raymond Shaw, USA, the chief suspect.
** [[James Gregory]] as [[United States Senate|Senator]] John Ickes Iselin, his stepfather and seeker of the nomination for [[Vice President of the United States]].
** [[James Gregory]] as [[United States Senate|Senator]] John Ickes Iselin, his stepfather and seeker of the nomination for [[Vice President of the United States]].
−
** [[Angela Lansbury]] as Raymond Shaw's mother and Senator Iselin's wife.
+
** [[Angela Lansbury]] as Mrs. Iselin, Raymond Shaw's mother and Senator Iselin's wife. That her first name is never spoken in dialogue might or might not be significant.
** [[Henry Silva]] as Chunjin, a [[Korea]]n interpreter (and Communist spy).
** [[Henry Silva]] as Chunjin, a [[Korea]]n interpreter (and Communist spy).