Stewart's last screen appearance of 1939 came in the Western parody "Destry Rides Again", in which he portrayed a pacifist lawman and Marlene Dietrich a saloon girl who falls in love with him. It was critically and commercially successful. "TIME" magazine wrote, "James Stewart, who had just turned in the top performance of his cinematurity as Jefferson Smith in "Mr. Smith Goes to Washington", turns in as good a performance or better as Thomas Jefferson Destry." Between films, Stewart had begun a radio career, and had become a distinctive voice on the "Lux Radio Theater", "The Screen Guild Theater" and other shows. So well-known had his slow drawl become that comedians began impersonating him.