In episode 5, when Adam is trying to persuade Margaret not to go to Hendrick's house, he gives her a drink in a sherry glass. At the end of the scene, she gives him back the empty glass - which has suddenly become a whisky tumbler.
At the end of the series, it is revealed that the village existed within a "psychic bubble" within which, once someone entered the circle of stones surrounding the village, they could not leave. However, in the very first episode, Dr. Brake arrives in the village to find that a moving company has delivered several boxes of scientific equipment and, following the delivery, departed the village without any problem.
When Adam is shocked into unconsciousness by one of the stones at the end of the first episode, Margaret is the only one with him, and they're a good distance from his cottage. But at the beginning of episode 2, Adam has somehow been carried to the cottage and deposited on the sofa, which is where he wakes up. Peter's similar transport in a later episode is explained away by the presence of the doctor who examines him for concussion, but no such explanation is given here.