Cast
Frank Austin
Henchman (uncredited)
William Newell
Andrews
William H. O'Brien
Nightclub Waiter (uncredited)
William Hopper
Announcer
Willard Robertson
Inspector 'Mac' McDonald
Wilbur Mack
F. J. Thompson
John Holland
Druggist (uncredited)
Pierre Watkin
Kennedy
Granville Bates
Prof. Rexford Sterling
Byron Foulger
Pete Andorka
Josephine Whittell
Nurse Nelson
Mary Russell
Nurse (uncredited)
Monte Montague
Henchman (uncredited)
Carleton Young
Radio Announcer (uncredited)
Robert Livingston
Dr. Lawrence Baxter
Grace Bradley
Jean Sterling
Smiley Burnette
Jimmy
Matty Fain
Burke