Onder andere met: Bela Lugosi (Dr. Lorenz), Luana Walters (Patricia Hunter), Tristram Coffin (Dr. Foster), Elizabeth Russell (Countess Lorenz), Minerva Urecal (Fagah), Angelo Rossitto (Toby (as Angelo)), Joan Barclay (Alice Wentworth), Kenneth Harlan (Keenan), Gwen Kenyon (Peggy Woods), Vince Barnett (Sandy), Frank Moran (Angel), George Eldredge (Mike)