Lost City of the Jungle.

A movie serial in 13 chapters, and Lionel Atwill's final film: Following the end of WWII, war-monger Sir Eric Hazarias sets the wheel in motion for WWIII. His search for Meteorium 245, the only practical defence against the atomic bomb, leads him to mythical Pendrang. Obstructing his sinister plan to rule the world are Rod Stanton, United Peace Foundation investigator, Tal Shan , Pendrang native, and Marjorie Elmore, daughter of scientist Dr. Elmore, unwilling assistant to Sir Eric.