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