Il segreto del dottore Cast & Crew
Richard BarthelmessKarl Brenner Marian MarshLotti Brenner Norman FosterStephan Brenner Lucille La VerneMartha Brenner, Karl's foster mother (as Lucille LaVerne) John St. PolisDr. Niergardt George RosenerDr. Von Bergman Nigel De BrulierAutopsy Surgeon (uncredited) Houston BranchSceneggiatura Emric FoeldesTheatre Play 
