Characters played by Bela Lugosi
Prof. Leonide
Characters played by George Zucco
Dr. Joseph Van Ee
Characters played by Nat Pendleton
Bill Raymond
Characters played by Molly Lamont
Laura Van Ee
Laurette La Valle
Characters played by Joyce Compton
Jane Cornell
Characters played by Gladys Blake
Lilybeth
Characters played by Roland Varno
Ward Van Ee
Characters played by Douglas Fowley
Terry Lee
Characters played by Stanley Andrews
Pathologist
Characters played by Angelo Rossitto
Indigo
Characters played by Lee Bennett
Rene the Killer
Characters played by Stanley Price
Autopsy Surgeon
Characters played by Dorothy Christy
Mrs. Williams