 The original story for this serial featured munitions runners, Alice  and Gordon mistaken for spies and pursued by the Guatemalan police,  and Ula Vale as a mysterious figure revealed in the final episode to  be an undercover government operative. The script was rewritten  during production and these elements dropped. However, the original  treatment was used for the pressbook synopsis and the original  chapter titles were retained despite lacking relevance any longer  (e.g. "Operative 17" as the final chapter). Virtually all  Tarzan/serial film "historians" continue to refer to the pressbook  synopsis, also, instead of watching the serial, and thus fail to  accurately present the story that was finally filmed. Caveat emptor.