演职人员
Dr. Lawrence Baxter
Robert Livingston
Jean Sterling
Grace Bradley
Inspector 'Mac' McDonald
威拉德·罗伯逊
Kennedy
皮埃尔·沃特金
Jimmy
Smiley Burnette
Prof. Rexford Sterling
Granville Bates
Andrews
William Newell
Pete Andorka
Byron Foulger
F. J. Thompson
Wilbur Mack
Burke
Matty Fain
Nurse Nelson
Josephine Whittell
Swain
Charles Timblin
Kellogg
Billy Griffith
Announcer
威廉·霍珀
Golden
Frank Du Frane
Nurse (uncredited)
Mary Russell
Spinster
Florence Gill
Henchman (uncredited)
Frank Austin
Henchman (uncredited)
Richard Beach
Hospital Administrator (uncredited)
Harrison Greene
Druggist (uncredited)
John Holland
Henchman (uncredited)
Monte Montague
Nightclub Waiter (uncredited)
William H. O'Brien
Radio Announcer (uncredited)
卡尔顿·杨