 Beginning in 1934, he began supporting himself by singing on the radio, including such programs as "Air Breaks" and "Hammerstein's Music Hall".Unable to land work as an opera singer, Cassel tried his luck in Hollywood and managed to land a good sized supporting role in the 1937 film "Wine, Women, and Horses" which starred Barton MacLane and Ann Sheridan.This was followed by a leading role in the 1938 film "Romance Road" where his love interest was portrayed by Anne Nagel.