Reparto y equipo
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Lionel AtwillIvan Igor - Fay WrayCharlotte Duncan
- Glenda FarrellFlorence Dempsey
- Frank McHughJim
- Gavin GordonGeorge Winton
- Edwin MaxwellJoe Worth
- Holmes HerbertDr. Rasmussen
- Arthur Edmond GuillezProfessor Darcy
- Allen VincentRalph Burton
- Monica BannisterJoan Gale
- Matthew BetzHugo
- DeWitt Clarke JenningsPolice Captain
- Thomas E. JacksonDetective
- Bull AndersonJanitor (uncredited)
- Pat O'Malley (actor)Plainclothesman (uncredited)
- Michael CurtizDirección
- Henry BlankeProducción
- Don MullalyEscritor
- Carl EricksonEscritor