A serial killer terrorizes London. Each victim is found with a telegram signed "The Marquis." There seems to be no other common thread between the victims, and Scotland Yard is baffled. Novelist and amateur sleuth, Paul Temple, is warned to stay away from the case, but he and his glamorous wife Steve can never refuse a good mystery.
Director
Maclean Rogers
John Bentley
Paul Temple
Patricia Dainton
Steve Temple
Peter Gawthorne
Sir Graham Forbes
Valentine Dyall
Bradley
Ronald Leigh-Hunt
Inspector Ross
Grey Blake
Storey
Dan Jackson
Sakki the Valet
Robert Urquhart
Slater
Christopher Lee
Sir Felix Raybourne
Michael Mulcaster
Sir Graham's Police Aide
Andreas Malandrinos
Sammy Wren
GB
