A 15-episode serial starring Buster Crabbe.

Mary Brooks' father, who has been studying ancient tribes, falls into the hands of "the people of Zar, god of the Emerald Fingers." Tarzan helps Mary locate her father, rescues everyone from the High Priest of Zar, and takes Mary to his cave.

After living all his chilhood in the street, a young boy notices rapidly that crime doesn't pay and that´s why he decides to become a policeman. One day, one of his best friends go in prison for a murder he didn't commit. Immediately the policeman tries his best to release him and prove his innocence.

A mad killer is on the loose in a hotel on a dark, gloomy night.

Tarzan spurns the love of La, Queen of Opar. When he isn't trying to keep the Bolshevik Rokoff and Clayton (pretender to the Greystoke estate) from reaching Opar, he is attacked simultaneously by two lions, dropped into a pit when a volcano splits the ground, nearly sacrificed by sun worshipers, and so on.