Jungle Jim fights a lion and sharks trying to save an African village from those who would despoil it.

When Professor Marsh disappears while searching for the lost city of Lukachukai, his daughter enlists the help of the Three Mesquiteers.

The passengers and crew of an airplane are stranded in an unfamiliar jungle. Unknown to most of the survivors is a criminal among them who caused the crash.

Someone wants to kill Magpie Harper. Crash and Dusty arrive too late, Magpie Harper is allready dead.

When a treasure hunter seeks a downed airplane in the jungles of Africa, he encounters one of the passenger's young daughter, now fully grown, and with a gorilla protector.

A crate containing a live gorilla is delivered to a mountain cabin Hugh has rented.

The first manned expedition to Mars is invaded by an unknown life form, which stows away on the rescue ship.

In the midst of some friendly horseplay on their "Flying R" ranch, the Range Busters, Crash Corrigan, Dusty King and Alibi Terhune, are sobered by the arrival of a buckboard bearing their old friend Larry Meadows and his niece Dorrie Willard. Meadows seeks their aid against a gang of outlaws terrorizing his town. Ernie Willard, Dorrie's brother, has been taken in by Tex Laughlin who is using the Willard ranch as an undercover for his real occupation as a member of a gang of outlaws led by Tim Douglas, a supposed friend of the Willards.

A fortune hunter leads a search for diamonds guarded by undead sailors off the coast of Africa.

The entertainment duo Mitchell & Petrillo, en route to a USO show for troops in Guam, fall out of their plane and end up on the jungle island of Cola Cola, where the mad scientist Dr. Zabor is conducting evolutionary experiments.