J. Frank Glendon

Re-edited feature version of serial The Phantom Empire (1935). Singer Gene Autry discovers a race of advanced humans living beneath the earth.

A card sharp steps in when a Mexican family's ranch is threatened by swindlers and cheats.

Tex Weaver is working under cover to bring in a gang of bank robbers. When he is killed, Tim Ross, a marksman with Doc Shaw's traveling show, takes over. Posing as a Mexican he lays a trap for the gang.

To prevent a lynching, Ranger Tim lets two outlaws go saying he will get them later. This gets him kicked out of the Rangers and he goes across the border and joins Big George's gang who are running contraband. But the outlaw Jimmy overhears Tim tell his sister that the dismissal was a fake. Big George and his gang then go after Tim and trap him in a cabin.

Merwin hires Barton to fight Welsh, but when Barton arrives in town, Welsh mistakes him for the hired killer Single-Shot Smith. Figuring he can help Merwin by being part of Welsh's gang he hires on as Single-Shot. But soon the real Single-Shot appears.

Profiteer Alexander Stiles lays claim to a million acres of range in the Pecos River country, but a rancher named Claybor stands in his way as he has already claimed the water-rich location of Sweetwater as his own.

Corporal Larry Grant and Sergeant "Mac" McGowan, of the United States Marine Corps, are rival for the love of Frances Schiller, but team up to hunt down "The Tiger Shark," a mad, scientific wizard who is holding Sergeant William Schiller, Frances' brother, a prisoner on a wild, jungle island in the Pacific.

Sent by the Army, Andy Thomas poses as a renegade to find out who has been harassing the wagon trains.

Two competing teams of scientists search the African jungles for a secret formula.

Canadian Mountie goes undercover to catch his brother's killers.