The Sontaran Experiment - Part 1
The Doctor, Sarah, and Harry arrive on Earth by transmat beam. There are no signs of civilization. Sarah and Harry go for a walk. The Doctor stays at the site where they materialized and works on the receptors which seem a bit scrambled.
Sarah thinks she hears something after they have gone a ways but Harry thinks she's imagining things. Harry steps into a trap and falls into a crevasse. He can't climb out. Sarah goes to find the Doctor but he has disappeared.
While Sarah and Harry are gone the Doctor hears a noise. He sees a human in a space suit running from a robot. The human falls off a cliff. The Doctor arrives at the body just before the dead man's friends do. They shoot the Doctor which knocks him out and take him back to their camp.






