
A husband-and-wife detective team look into the murder of one of her friends, whose father--a prominent scientist--has been kidnapped. They find themselves up against a sinister crime organization headed by a mysterious figure known only as "Z".
Cast

John Bentley
Paul Temple

Dinah Sheridan
Steve Temple

Jack Livesey
Sir Graham Forbes

Beatrice Varley
Mrs. Weston

Barbara Couper
Mrs. Morgan
Jenny Mathot
Jacqueline Giraud
Andrew Leigh
Professor Hardwick
Hugh Dempster
Oliver Ffollett

Dino Galvani
Van Draper

Ivan Samson
Major Murray

Bruce Seton
Bill Bryant
Leo de Pokorny
Dr. Steiner

Michael Brennan
Hammond

Joseph O'Conor
Inspector Crane
Shaym Bahadur
Rikki
Gerald Rex
Ernie
Ben Williams
Mr. Weston
Anne Hayes
Celia Hardwick

Peter Butterworth
Post Office Engineer
Hamilton Keene
An Interested Visitor
Frederick Morant
Doctor
Jean Packer
Nurse
Dennis Val Norton
1st Gangster
Michael Hogarth
2nd Gangster
