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