Future Academy Award Best Supporting Actor winner Ben Johnson was Johnny Weissmuller's stunt double in the horse riding scenes.
According to a New York Times news item, the Arabian village used in the picture was built by Cecil B. DeMille for his film The King of Kings (1927). The exterior sets appearing here as "Birherari" were later seen as the mythical Middle Eastern kingdom visited by Elvis Presley in Harum Scarum (1965).
If you're an avid TCM fan, you may recognize Nancy Kelly, who plays former circus acrobat Connie. More than a decade later, Kelly would land her best known role - as the distraught mother who suspects her precocious daughter may actually be a murderer, in both the stage and screen versions of the classic psychological drama The Bad Seed (1956). For the movie version, she was an Oscar® nominee as Best Actress.
Producer Sol Lesser decided to re-shoot the film's entire ending in August 1943. In the original ending, "Connie" is recaptured by "Hendrix," taken back the city and about to be hanged when "Tarzan" comes to her rescue and delivers the bracelet to "Sheik Abdul El Khim." The sheik then arrests "Strader" and "Hendrix," who escape but are captured by "Sheik Amir" and his army.