Ep 15. Mission to Planet Peril / The Pernicious Parasite

Alien raiders forced to Earth recruit Superman to rescue hostages on their home world. While breaking into a science lab, a petty criminal named I.C. Harris is exposed to a radioactive isotope and achieves power to drain physical strength from other men. With his new power, he aims to become a "Superman of Crime" - but when he discovers the real Superman his unstoppable greed for physical power proves fatal.