Trailer
Images
 | Robert Livingston as Dr. Lawrence Baxter |
 | Grace Bradley as Jean Sterling |
 | Willard Robertson as Inspector 'Mac' McDonald |
 | Pierre Watkin as Kennedy |
 | Smiley Burnette as Jimmy |
 | Granville Bates as Prof. Rexford Sterling |
 | William Newell as Andrews |
 | Byron Foulger as Pete Andorka |
 | Wilbur Mack as F. J. Thompson |
 | Matty Fain as Burke |
 | Josephine Whittell as Nurse Nelson |
 | Charles Timblin as Swain |
| Billy Griffith as Kellogg |
 | William Hopper as Announcer |
| Frank Du Frane as Golden |
 | Mary Russell as Nurse (uncredited) |
| Florence Gill as Spinster |
 | Frank Austin as Henchman (uncredited) |
| Richard Beach as Henchman (uncredited) |
| Harrison Greene as Hospital Administrator (uncredited) |
 | John Holland as Druggist (uncredited) |
 | Monte Montague as Henchman (uncredited) |
 | William H. O'Brien as Nightclub Waiter (uncredited) |
 | Carleton Young as Radio Announcer (uncredited) |
| Directing | |
| Irving Pichel | Director |
Writing | |
| Endre Bohem | Screenplay |
| Richard English | Story |
| Richard English | Screenplay |
Sound | |
| Hugo Riesenfeld | Original Music Composer |
Camera | |
| Jack A. Marta | Director of Photography |
