Black Hills Ambush is a 1952 western directed by Harry Keller and written by Ronald Davidson and M. Coates Webster. United States Marshal 'Rocky' Lane (Allan Lane) travels into the Black Hills to help his old friend Nuggett Clark (Eddy Waller) whose freight business faces bankruptcy due to theft from bandits. Rocky observes that the bandits only steal outgoing shipments, and concludes that the stolen items are being repackaged and resold. To test his theory, Rocky intercepts a bandit shipment. Instead of finding relabeled consumer goods, he finds several bars of gold. The bandits are smuggling stolen gold within the shipments of goods. To find the source of the gold, Rocky poses as an outlaw and tries to make contact with the leaders of the bandits. His plans become complicated and Nugget is forced to ride to his friend's rescue. All the pieces quickly come together for a surprising and dramatic ending.