In England, an eccentric police inspector, an earnest test pilot and a spunky female reporter team up to solve the mystery of a series of test aircraft which have disappeared without a trace while over the ocean on their maiden flights; unaware, as they are, that a spy ring has been shooting the planes down with a ray machine hidden aboard a salvage vessel which is on hand to haul the downed aircraft aboard, crews and all.
Ralph Richardson
as Maj. Charles Hammond
Laurence Olivier
as Tony McVane
Valerie Hobson
as Kay Lawrence
George Merritt
as Mr. Barrett
George Curzon
as Jenkins
Roy Emerton
as Viking First Mate
Frank Fox
as Karl
Gus McNaughton
as Blenkinsop, Hammond's Butler
George Butler
as Air Marshal Gosport
Gordon McLeod
as The Baron
Hay Petrie
as Stage Door Keeper
Sandra Storme
as Daphne
