In 2070 A.D., the Doctor (
Patrick Troughton) and his friends arrive at the moonbase which controls the Earth's weather. Here they become aware of a sinister presence, but at first the Doctor isn't certain what that presence might be. As various members of the moonbase staff mysteriously disappear, it becomes increasing obvious who -- or what -- is behind it all. Written by Kit Pedler and (uncredited) Gerry Davis, the four-part "The Moonbase" presented its first episode on February 11, 1967. Neither this episode nor the third chapter is presently available in the BBC archives. ~ Hal Erickson, All Movie Guide