Technician Anton Zoref starts his day on Moonbase Alpha like any other, but unknown to him, the rest of the base has been frozen in time – an event corresponding with the arrival of a glowing blue cloud of energy. It simply passes through the moonbase’s walls and takes Zoref over. When the rest of the crew begins moving again, they have no memory of the blue energy that they observed approaching the moon. When Zoref awakens, even he seems normal – until he shorts out a medical monitor as Dr. Russell gives him a routine checkup. That’s just the beginning of the strange signs Zoref exhibits. He now seems to be able to drain energy from any source on the moonbase, and his hunger for that energy is beyond his control. When Zoref’s abilities grow to include draining energy from other living beings, Koenig declares him a deadly threat and reluctantly orders his termination. But when Koenig powers down Moonbase Alpha’s reactors to starve the creature that is now stalking the corridors, will he really risk the lives of everyone on the base to carry out one death sentence?
written by Johnny Byrne
directed by David Tomblin
music by Barry Gray
additional music by Vic Elms
Guest Cast: Ian McShane (Anton Zoref), Gay Hamilton (Eva), Prentis Hancock (Paul Morrow), Clifton Jones (David Kano), Zienia Merton (Sandra Benes), Anton Phillips (Dr. Mathias), Nick Tate (Alan Carter), John Hamill (Mark Dominix), Eva Reuber-Staier (Jane)
Note: This is the first episode (in the original broadcast order) to mention Professor Bergman’s artificial heart.
LogBook entry by Earl Green