On screen
Cast
24 credited performers
John Bentley
Paul Temple
Dinah Sheridan
Steve Temple
Jack Livesey
Sir Graham Forbes
Beatrice Varley
Mrs. Weston
Barbara Couper
Mrs. Morgan
Artwork unavailable
Jenny Mathot
Jacqueline Giraud
Artwork unavailable
Andrew Leigh
Professor Hardwick
Artwork unavailable
Hugh Dempster
Oliver Ffollett
Dino Galvani
Van Draper
Ivan Samson
Major Murray
Bruce Seton
Bill Bryant
Artwork unavailable
Leo de Pokorny
Dr. Steiner
Michael Brennan
Hammond
Joseph O'Conor
Inspector Crane
Artwork unavailable
Shaym Bahadur
Rikki
Artwork unavailable
Gerald Rex
Ernie
Artwork unavailable
Ben Williams
Mr. Weston
Artwork unavailable
Anne Hayes
Celia Hardwick
Peter Butterworth
Post Office Engineer
Artwork unavailable
Hamilton Keene
An Interested Visitor
Artwork unavailable
Frederick Morant
Doctor
Artwork unavailable
Jean Packer
Nurse
Artwork unavailable
Dennis Val Norton
1st Gangster
Artwork unavailable
Michael Hogarth
2nd Gangster