“Professor Calthrop, actuated only by scientific motives, and his assistant, out for his own gain, have invented a system for the manufacture of diamonds.” - BFI.
Noel Madison
Joseph
James Stephenson
Ben
Lesley Brook
Helen Calthrop
Wilfrid Lawson
Gallanie
George Galleon
Tony
Renee Gadd
Marianne
Philip Ray
Tompkins
Hector Abbas
Nichols
Wally Patch
Alf Higgins
J. Fisher White
Prof. Calthrop
Dino Galvani
James Regan
Ralph Ince
Director
Irving Asher
Executive Producer
Michael Barringer
Script
Anthony Hankey
Basil Emmott
Director of Photography
Frank Richardson
Screenstory
