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