The Fighting Devil Dogs (1938) is a 12-chapter Republic movie serial starring Lee Powell and Herman Brix, the latter better known by his later stage name, Bruce Bennett.

While not often considered a great serial, as it contains much stock footage and two recap chapters, it is famous for its main villain, the Lightning—the first costumed supervillain.

[4] 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.

Writer Raymond William Stedman claims that the science fiction Flying Wing in this serial was the beginning of the process that killed interest in ordinary aviation.