★★★☆☆ UK. 1h22m. Comedy / Mystery. Directed by Tim Whelan, Arthur B. Woods. Written by Brock Williams, Jack Whittingham, Ian Dalrymple. Cinematography by Harry Stradling Sr. Edited by Hugh Stewart. Music by Muir Mathieson. Starring Laurence Olivier, Ralph Richardson, Valerie Hobson, George Curzon, George Merritt, Gus McNaughton, David Tree.
In September 1938, advanced British aircraft prototypes carrying experimental and secret equipment are vanishing with their crews on test flights. No one can fathom why, not even spymaster Major Hammond or his sister Kay, a newspaper reporter, who is working undercover in the works canteen at the Barrett & Ward Aircraft Company.