Nancy Kelly was the female lead; Jane would return in the next film in the series.

TARZAN'S DESERT MYSTERY (1943)
Johnny Weissmuller (Tarzan), Nancy Kelly (Connie Bryce), Johnny Sheffield (Boy), Otto Kruger (Paul Hendrix), Joe Sawyer (Karl Strader), Lloyd Corrigan (Sheik Abdul El Khim), Robert Lowery (Prince Selim), Frank Puglia (Magistrate), Philip Van Zandt (Kushmet). (and Cheta the monkey)

Directed by Wilhelm (as William) Thiele; Screenplay by Edward T. Lowe; story by Carroll Young based on characters created by Edgar Rice Burroughs; Produced by Sol Lesser and Kurt Neumann; Original music: Paul Sawtell; Music Department: C. Bakaleinikoff; Cinematography: Russ Harlan and Harry Wild; Film Edited by Ray Lockert; Art Direction: Ralph Berger and Hans Peters; Assistant director: Derwin Abrahams; Sound technicians: Bailey Fesler and Jean L. Speak; Stunts: Ben Johnson and Paul Stader; Wardrobe: Elmer Ellsworth.
Sol Lesser Productions (as Principal Artists Productions)
RKO RADIO PICTURES
Release date: December 26, 1943
Running time: 70 Minutes
Filmed in Black and White

      In response to a letter from Jane, who is in England nursing British troops, Tarzan and Boy trek across the desert looking for jungle plants to be used in creating a malaria serum. On the way they save a Jaynar, a wild horse, from a German, arrive at an Arab city and .rescue a stranded American magician, Connie Bryce, When they reach Bir Herari, they meet Hendrix, who is really the Nazi, Heinrich, whom Connie is on a mission to expose. Heinrich arrests Tarzan as a horse thief. Heinrich and his cronie, Strader, follow Connie who is delivering a message to the sheik's palace. The Germans kill the sheik's son, Prince Selim and frame it on Connie who is sentenced to hang. Tarzan escapes and summons the stallion Jaynar and during the resulting stampede, Tarzan is able to rescue Connie and take her to a nearby jungle where Tarzan fights off prehistoric monsters to obtain the fever medicine. He battles a maneating plant and throws the Nazis to be killed by a giant spider.

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