Arrest Bulldog Drummond is a 1938 American crime thriller film directed by James P. Hogan.

They are summoned to the house of Richard Gannett, an eccentric scientist, who has invented a prototype electric "death-ray" device which has the potential to revolutionize warfare.

Bulldog is released for lack of evidence and visits the local botanical gardens where he discovers a loaned stingray is missing.

Drummond concludes the death ray machine is near areas reporting flickering lights.

Algy and Tenny are captured trying to foil Alferson’s attempt to sell the machine to a foreign power.