The Phantom of the Air: E03: The Avenging Phantom

The Phantom of the Air is a 12-episode 1933 Pre-Code Universal film serial directed by Ray Taylor. The film stars Tom Tyler, who was cast most often in Westerns. Other actors include Gloria Shea, LeRoy Mason, Craig Reynolds and William Desmond.
Scientist Thomas Edmunds (William Desmond) and his daughter Mary (Gloria Shea) attend the National Air Races in Cleveland, Ohio to find a pilot. They select pilot Bob Raymond (Tom Tyler) from the U.S. Border Patrol, to demonstrate an anti-gravity device called the "Contragrav". At the air meet, Mortimer Crome (LeRoy Mason), a friend of Mary, is his main rival and has his henchman "Skip" (Walter Brennan) sabotage Raymond's aircraft prior to the air race. Raymond crashes but survives.

Edmunds' invention is sought after by a gang of smugglers led by Crome who owns the International Import & Export Company, who wants the invention. The inventor has a secret airfield in a desert region. Raymond comes to the inventor's aid, using another of Edwards' inventions, the superplane, the "Phantom." Able to control the aircraft remotely from an underground headquarters, Bob foils Crome's plans. Gloria has become Bob's love interest.

A last attempt to get at the inventor's work leads to an explosion at his workshop that kills the criminals. Edmunds escapes and is reunited with Gloria and Bob.