Cast
Herbert Lom
Dr. Alex Leon
Muriel Pavlow
Caroline Cartier
Herbert Lomas
George Jackson
Johnnie Schofield
Jim Barnes (uncredited)
James Donald
Michael Heathley
Phyllis Calvert
Lydia Heathley
Robert Beatty
Maj. Sam Seagram
Walter Fitzgerald
Sir Charles Craddock
Cyril Chamberlain
Inspector Carter
Marianne Stone
Maisie
Philip Ray
Sentry (uncredited)
Noel Willman
Dr. Dennis Bord
Patric Doonan
Brian Jackson
Hartley Power
General Adams (uncredited)
Maurice Denham
Prof. Carrington
Marjorie Fielding
Michael's Mother
Hal Osmond
Agent Lawson
Stanley Maxted
Prof. Adams