De gaadefulde Mord Skuespillere og folkene bag
William PowellPhilo Vance Florence EldridgeSibella Greene Ullrich HauptDr. Von Blon Eugene PalletteSergeant Heath E.H. CalvertJohn F. X. Markham Gertrude NormanMrs. Tobias Greene Lowell DrewChester Greene Augusta BurmeisterMrs. Mannheim Veda BucklandNurse (uncredited) Shep CampMedical Examiner (uncredited) Charles E. EvansLawyer Canon (uncredited) Helena Phillips EvansMiss O'Brien (uncredited) Mildred GoldenBarton (uncredited) Harry StrangPoliceman (uncredited) Henry W. GerrardDirector Of Photography Travis BantonCostume Design Karl HajosKomponist af original musik Dick StocktonCasting Assistant 
