Victor Metzetti

A young girl, who is about to receive a large inheritance, is abducted to an isolated sanitarium where a crazed doctor is performing strange experiments.

An ex-con makes for a backwoods town intending to rob the bank, and becomes involved in protecting three orphans from land swindlers instead. (imdb)

A prospector is murdered by The Cactus Kid and his gang, who hope to find the murdered man's goldmine. The miner's dog, Rin-Tin-Tin, recognizes the killers, who thereafter seek to use the dog to locate the lost mine. With the help of a government agent and a young girl, Rinty saves the mine and brings the bad guys to justice. (imdb)

An inventor develops a new type of aircraft. A crooked businessman attempts to buy it but the inventor refuses to sell it to him, whereupon the rejected businessman and his henchmen steals the plane and its blueprints. The plane's test pilot, who is the boyfriend of the inventor's daughter, and his sidekick set out to get the plane, and the plans, back. (imdb)

A visitor to a big city gets involved in intrigue when a look-alike jewel thief sets out to doublecross his gang. (imdb)

Two competing jewel thieves hunt for a load of diamonds.