Trying to get Tegan back to Heathrow in 1981, the Doctor brings the TARDIS to the right place, but over 300 years early - in 1666. They are not the only visitors as Death stalks the local woods, complete with cloak, scythe and a skull-like face. In fact, 'Death' is an android brought by a group of alien Terileptils whose spaceship has crashed.