Fictionalized story of British aerospace engineers solving the problem of supersonic flight.
Ralph Richardson
as John Ridgefield
Ann Todd
as Susan Garthwaite
Nigel Patrick
as Tony Garthwaite
John Justin
as Philip Peel
Dinah Sheridan
as Jess Peel
Joseph Tomelty
as Will
Denholm Elliott
as Christopher Ridgefield
Jack Allen
as 'Windy'
Ralph Michael
as Fletcher
Leslie Phillips
as Controller
Donald Harron
as ATA officer
Vincent Holman
as Factor
