Space: 1999

Season 2, Episode 23

Episode Title: The Immunity Syndrome

Air Date: 1977-10-29

Overview:

The arrival of the Alphans on another planet seems to cause a change in its atmosphere, setting off pollution and poisoning of the water. They meet Zoran, the sole survivor of the last exploratory force, who tells them that the planet is controlled by an immortal being - with whom Koenig must parley if he and his crew are to leave the planet alive.