Earth, the distant future. Beaming down from the Nerva Beacon, the Doctor and his friends discover Earth is habitable once more. Unfortunately a robot is capturing a group of human soldiers on behalf of its mysterious alien master...
Elenco:
William Hartnell
,
Patrick Troughton
,
Jon Pertwee
,
Tom Baker
,
Peter Davison
,
Colin Baker
,
Sylvester McCoy
.