Douglas Williams

 was a boy who had died and was brought to Carnon Manor.

Doug tried to escape from the house by throwing himself from the highest point, but since he was already dead, it didn't work. He reappeared back inside the house.

When Lord Carnon offered freedom to the house's inhabitants if they would kill the Fifth Doctor, Doug tried to strangle him. However, the Doctor overpowered him. (PROSE: The Eternity Contract)