Sgt. Renfrew and Constable Kelly search for a missing plane carrying gold. Inventor Speavy's power ray, used by crook Morgan and Prof. Lewis, threatens the plane's safety. When Speavy is killed, Madeleine stows away. Can the crooks force Lewis to use the ray?

Sky Bandits (1940)

The British sleuth's fiancee helps him chase spies who killed an inventor and stole his death ray.

Arrest Bulldog Drummond (1938)

Sir James Blake is called onto the case after an experimental death ray is stolen.

Blake of Scotland Yard (1937)

A professor has an invention that will bring down planes, causing them to crash, and Dawson is forcing him to use it on those carrying money. When Tim arrives to investigate, he is mistaken for a noted outlaw. So he assumes that identity to force Dawson to make him a partner. But just as the plane bringing Tim help is arriving, his true identity is revealed, and while he is a prisoner, Dawson forces the Professor to start his machine.

Death Rays!