12x10 The Sontaran Experiment, Part Two
First Aired: Mar. 01, 1975 on BBC One
Summary: Earth, the distant future. Beaming down from the Nerva Beacon, the Doctor and his friends discover Earth is habitable once more. Unfortunately a Sontaran officer is conducting tests on a group of human colonists to determine their ability to withstand a full-scale invasion...
Guest Stars[no credits found]