The Monster of Blackwood Castle

Humphrey Connery

Jane Wilson

Sir John

Lady Agathy Beverton

Miss Finley

Catherine Wilson

Dorothy Cornick

Anwalt Robert Jackson

The Captain

Doc Adams

Lord Henry Beverton

Ken Nelson

Edward Baldwin

Grimsby

Tom Heyes

Dr. Sheppard

Hausknecht Jameson

Tucker (uncredited)

Inspizient (uncredited)

Edgar Wallace

The 25th anniversary film of Rialto's Edgar Wallace Series.

In the early days of production, another project entitled "The Angel of Terror" (an original Edgar Wallace novel title) was intended to become the 25th Film of the series. The film was to be a West German-British co-production directed by Harald Reinl (it would've been his 6th Edgar Wallace Film and his first in color). Due to economical trouble of the British Co-Producers and scheduling conflicts of Reinl who was directing "Dynamit in grüner Seide" in late 1967, the project was abandoned.