The best Donald Douglas’s action movies

A group of archaeologists asks Tarzan to help them find an ancient city in a hidden valley of women. He refuses, but Boy is tricked into doing the job. The queen of the women asks Tarzan to help them.

Pulp hero "The Spider" seeks to destroy all criminals. In this serialized adventure, he battles The Octopus, who intends to replace the government of the United States.

An outbreak of cholera threatens a luxury liner in this surprisingly low-budget melodrama from RKO. En route from Shanghai to San Francisco, chief engineer Crusher McKay (Victor McLaglen) and shipboard doctor Tony Craig (Chester Morris) become rivals for the attention of nurse Ann Grayson (Wendy Barrie). A Chinese stowaway, meanwhile, infects the stokehold with cholera and it is left to Crusher to keep the engines at full throttle until reaching harbor. But morale sinks to an all-time low when Crusher himself is stricken and the overworked men threaten with mutiny. Tony attempts to keep the stokers in check but the situation is growing more dangerous by the minute when a heroic Crusher rises from his sickbed. Leaving their previous petty squabbles behind, Tony and Crusher manage to guide the ship safely to harbor, where the doc and Ann rekindle their romance.

The night before his grandson, Tommy Grayson, a mechanic at the Midland Aircraft Corporation, is to marry Gail, a former showgirl, Major Matt Grayson, a war veteran and watchman at the plant, catches two men breaking into the machine shop. The men run, but the major shoots one of them.....

In Puerto Rico to investigate a glut of contraband diamonds that are flooding the world's jewel market, Mr. Moto and his sidekick, a wrestler, find themselves involved in murders by thrown daggers, the frame-up of an overstressed Army colonel, and a pirate gang led by an unknown boss who has inside knowledge of the ensuing investigation.

T-Man Brass Bancroft goes undercover in a prison which has a secret counterfeit operation set up in the print shop.

A young boxer gets caught between a no-good father and a crime boss when he starts dating the boss's daughter, although she doesn't know what daddy does for a living.