Air: Feb 11 1967. 4 eps, ep 2 and 4 found.
The Tardis lands on the moon and finds a moonbase. On it is a machine that controls the earth’s weather. They are currently facing a mysterious epidemic. But they later discover that it’s a plot set up by The Doctor’s old enemies, The Cybermen to take over the gravitron and destroy all human life on earth. Can the Doctor stop them?