 Dorn went over to MGM where he had support roles in "Escape" (1940) and "Ziegfeld Girl" (1941).Warners borrowed him to play the lead in "Underground" (1941).At MGM he had a support in "Tarzan's Secret Treasure" (1941) and they put him in a Dr. Kildare film, "Born to be Bad", that had to be reshot when star Lew Ayres was fired due to being a conscientious objector.