Rogue Arm - S1.E39

The Queen launches a special psychocrystal through hyperspace. It manages to get on board a new ship of the navy that the Rangers happen to be taking on its maiden voyage tour of the solar system. The crystal takes over Zach's arm, and uses his lifeforce to power itself as it constructs a body out of servo droids. The Rangers have to stop it before it kills Zach.