"John Loder and Elliot Makeham star in Redd Davis’s British topical crime thriller. Professor Grayson is working on an anti-gas experiment and Dr. Klee, whose quiet advertising covers other welfares, means to find it."
John Loder
as Capt. Rufus Grant
Noel Madison
as Dr. Klee
Belle Chrystall
as Nora Grayson
Leonora Corbett
as Herlaine Frank
Jerry Verno
as Hugo Guppy
Davina Whitehouse
as Polly
Eliot Makeham
as Professor Grayson
Alexander Sarner
as Mr. Vander
Melville Crawford
as Pete Voss
Nigel Barrie
as Colonel Lockwood
Carl Melene
as Monsieur Buckner
Redd Davis
Director
E. Hayter Preston
Writer
Geoffrey Faithfull
Director of Photography
Cecil H. Williamson
Editor
Percival Mackey
Music Director
Hal Fuller
Sound Recordist
R. Holmes Paul
Art Direction
Arthur Barnes
Assistant Director