H.G. Wells, Hans J. Salter, Lester White, Edward Curtiss, Jack Otterson, Russell A. Gausman, Vera West, John P. Fulton, Curt Siodmak, Robert F. Boyle, Edward R. Robinson, Bernard B. Brown, William Hedgcock, David S. Horsley, John P. Fulton, Roswell A. Hoffmann, Eddie Parker, Duke York, Hans J. Salter, Richard Hageman, Frank Skinner, Roswell A. Hoffmann