This is a shortened version of the 1949 Republic serial "Ghost of Zorro," and was released to television as part of a syndicated package in 1959.
Two American Spies find themselves becoming superheros as a ruthless villain arises and plots against New York City.
A human becomes the super-hero Sparkman, after being granted super-powers by an alien princess in order to defeat the evil alien warlord who forced her to flee to Earth.