During WWII, Johnny Weissmuller and his Tarzan character proved useful for Allied propaganda purposes. In the film Tarzan Triumphs, the plot had the ape man fighting Nazis in Africa. In Tarzan's Desert Mystery, released at the height of the war in 1943, he is once again battling Brownshirts in the Libyan desert. Tarzan meets up with Connie Bryce (Nancy Kelly), an American showgirl, and tangles with mercenary Arabs, legions of Nazi warriors, a giant spider, and a bunch of dinosaurs who somehow escaped extinction. In short, it's Tarzan against every evil villain an American filmmaker could have imagined at the time. The film included Johnny Sheffield as Boy, Tarzan's son, along with Tarzan's customary sidekick Cheta the Chimp.
by Michael Betzold synopsis