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
CinemaSerf
When aircraft with secret gadgets aboard start disappearing all around the globe, "Maj. Hammond" (Ralph Richardson) reckons that there is something suspicious going on. His investigations - frequently interfered with by his aspiring journalist sister "Kay" (Valerie Hobson) - eventually, despite scep...