The script held in the Crawford Collection in the AFI Research Collection contains the following character notes (excluding regular characters):
'STEVEN FLETCHER. "The Whistler". A sex deviant. Tall, lithe, athletic. 25-30 years old.
'ELIZABETH DOUGLAS. "The She-Wolf". Victim. From a good family. Strikingly beautiful. 20-25 years old.
'SADIE JONES. The Mad Witch. Killer. Former governess. Astrologist. Intense. Should contrast with Virginia Carter. 55-60 years old.
'VIRGINIA CARTER. The not-quite-so-mad. Former hospital matron. Assured, practical, devious. 45-50 years old.
'WOLFIE HURST. Club Manager. Fake show-biz, "with-it" type. Essentially a con-man. 28-33 years old.
'MRS BENSON. A neighbour. Practical, down-to-earth, motherly. 40-45 years old.
'MR BENSON A neighbour. A good suburban father. 40-45 years old.
'SUE BENSON A normal, lively girl. 17 years old.
'PHILIP CASH. A member of the coven. Effeminate. 25-30 years old.
'SALLY FOSTER. Broken-down showgirl verging on alcoholism. Good-hearted. 35-45 years old.'