No one answers the front door, so the Doctor and Nyssa find a way in through a window. While searching the manor, they find more power packs, gunpowder and a mark from a high-energy weapon. The Doctor also notices that there is a wall where there shouldn't be one. And while he continues his investigation, Nyssa heads to the front door and lets the others in. But when they return to the wall, the Doctor is nowhere to be found. And as the four stand there trying to figure out where he's gone, a figure shuts and locks the door behind them.