The Dorcons are a race of conquerors who can live forever by transplantation of a Psychon brain stem. Maya, the last known Psychon, is traced to Moonbase Alpha by the Dorcons, who threaten the Alphans with destruction unless Maya is handed over.
Elenco:
Martin Landau
,
Barbara Bain
,
Catherine Schell
,
Barry Morse
,
Tony Anholt
,
Nick Tate
,
Prentis Hancock
,
Zienia Merton
,
Clifton Jones
,
Anton Phillips
.