In Part 1, an alien race of beings called the Skrill come to Earth to steal the minds of humans to be sold into slavery. Andros (Dack Rambo), son of the alien visitor from the 1940s, arrives with orders to capture the Skrill in six days. If he fails, his people will use insanity-inducement procedures on the Earth to prevent their escape. The Skrill find out Diana Price is also Wonder Woman. They get the Sardor monster to attack Diana and weaken her until Diana faints. Andros then saves her. Guest starring Vince Van Patten, whose father Dick had appeared in a season one episode.
Wonder Woman and Andros continue to battle the Skrill, who are even more dangerous now that they have deduced Wonder Woman's secret identity and captured Andros' mind.