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.

• Irving Asher Productions
• Ralph Richardson
• Laurence Olivier
• Valerie Hobson
• George Merritt
• George Curzon
• Roy Emerton
• Frank Fox
• Gus McNaughton