A secret jet aircraft capable of traveling three times the speed of sound is being developed by a group of scientists. On the day of the test flight, one of the scientists dies in a mysterious accident, and there are many arguments concerning the flight itself; some think it should be ground-controlled while Heathley (James Donald) wants it to be a manned flight with himself at the controls. Conflict also arises when one of his fellow scientists, taking advantage of Heathley's lack of attention toward his wife, Lydia (Phyllis Calvert), makes some moves on her. Then there is the question of just who is the enemy agent on the project.
Genres:
James Donald as Michael Heathley
Phyllis Calvert as Lydia Heathley
Noel Willman as Dr. Dennis Bord
Herbert Lom as Dr. Alex Leon
Robert Beatty as Maj. Sam Seagram
Patric Doonan as Brian Jackson
Walter Fitzgerald as Sir Charles Craddock
Muriel Pavlow as Caroline Cartier
Maurice Denham as Prof. Carrington
Marjorie Fielding as Michael's Mother
Herbert Lomas as George Jackson
Geoffrey Denton as Fisher
Cyril Chamberlain as Inspector Carter
Hal Osmond as Agent Lawson
Caven Watson as Dr. Ferguson
Marianne Stone as Maisie
Stanley Maxted as Prof. Adams
Hartley Power as General Adams (uncredited)
Philip Ray as Sentry (uncredited)
Johnnie Schofield as Jim Barnes (uncredited)
John Warren as Ted (uncredited)
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