Demon With a Glass Hand

S2, E5: Alien soldiers from the distant future of the Universe invade Earth via a time-mirror. Their mission: capture the last human to survive a war that's to occur in the future between Earth and the invaders. The single Earth survivor appears to be normal in all respects save one...His right hand is glass and contains a computer chip which holds the secret of where the future generations of Earthmen are hiding after the holocaust. But finally assembled it reveals the true identity of the Last Man of Earth.