THE FIGHTING DEVIL DOGS (1938)--a 1938 serial compilation

In Singapore, two Marine Lieutenants, Tom Grayson and Frank Corby, uncover the threat of a masked terrorist called the Lightning, who uses an arsenal of powerful lightning-based weaponry in his bid for world conquest. However, the battle becomes personal when the Lightning annihilates the officers' unit and later kills Lt. Grayson's father as he was helping the investigation of the weapon. Now, the marines have dedicated themselves to stopping the Lightning and bringing him to justice.