Information Space 1999 Episodes and gallery series 2.

[michaellevenson]

22. Devil's Planet.
After investigating a planet where all humanoid life had been eradicated, Koenig becomes trapped in a prison on one of the moons where no one knows that their planet has been wiped out. Except the prison governor Elizia who sends those questioning her leadership to the planet to die.

 

[michaellevenson]

23. The Immunity Syndrome.
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.

 

[michaellevenson]

24. The Dorcons.
The Dorcons - the most powerful race in the galaxy - have detected a Psychon on Alpha, who the Dorcons have been hunting for centuries. Due to the unusual body chemistry of the Dorcon anatomy, when infused with the brain stem of a Psychon the result is immortality for the Dorcon subject. The elderly leader of their race is awaiting Maya's brain stem, so she is abducted. Koenig becomes a stowaway on their ship to try and stop them.