1939. Comedy. Director: Tim Whelan. Stars: Ralph Richardson, Laurence Olivier & Valerie Hobson. A British Secret Service Agent named Major Hammond tries to discover who is using a secret weapon.

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.