A British agent's son is kidnapped and held for a ransom of diamonds. The agent finds out that he can't even count on the people he thought were on his side to help him, so he decides to track down the kidnappers himself.

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'...

A South American gunrunner uses an island in Hawaii as his base of operations. A squad of beautiful government agents is sent to put him out of business.

Pulled into the Mexican Revolution by his own greed, Texas gunrunner & pilot Lee Arnold joins bandit-turned-patriot Pancho Villa & his band of dedicated men in a march across Mexico battling the Colorados & stealing women's hearts as they go. But each has a nemesis among his friends: Arnold is tormented by Fierro, Villa's r...

A British mercenary arrives in pre-Revolution Cuba to help train the corrupt General Batista's army against Castro's guerrillas while he also romances a former lover now married to an unscrupulous plantation owner.