Synopsis: The Doctor and his companions land on a planet ruled by spherical robots called Gyros. When Gillian is captured the Doctor investigates and discovers a race of humanoids who are the survivors of a terrible illness. It soon transpires that the Gyros are the servants of another group of people who sealed themselves inside a building to avoid infection from the disease.
Synopsis: The malfunctioning TARDIS lands in London, 1969, where the Doctor discovers that Earth's inhabitants are under the hypnotic control of the alien Zagbors. Trapped in the immobile TARDIS and bombarded by the Zagbors high-powered ray cutters, The Doctor has no choice but to surrender to the aliens.