Summary: A secret jet aircraft capable of traveling three times the speed of sound is being developed by a group of scientists secretly. 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 wants it to be a manned flight with himself at the controls... (imdb)

AKA: Project M7

Genre: Drama

Country: UK

Directed By: Anthony Asquith

Written By: John Pudney, William Fairchild

Starring: Herbert Lom, Robert Beatty, Walter Fitzgerald, James Donald, Phyllis Calvert, Muriel Pavlow, Noel Willman, Patric Doonan

More information at the Internet Movie Database