Among the 65 movies he made over the next five decades were " The Cobweb " ( 1955 ) , in which he played the head of a psychiatric clinic where the staff seemed more emotionally troubled than the patients ; " Saint Joan " ( 1957 ) , as the Dauphin to Joan Seberg 's Joan of Arc ; John Wayne 's " The Alamo " ( 1960 ) , as Jim Bowie , the inventor of the Bowie knife ; " Judgment at Nuremberg " ( 1961 ) , as an American army colonel prosecuting German war criminals ; and John Ford 's revisionist western " Cheyenne Autumn " ( 1963 ) , as an army captain who risks his career to help the Indians .