PROSE: The Crawling Terror [Ch. 8, 9]

Motioning to Kevin and Constable Bevan to stay in the shadow of the encroaching trees, the Doctor made his way slowly across the farmyard towards the main door of the house.
He was halfway across the yard when Kevin suddenly caught sight of movement in the doorway. The letterbox was swinging slowly open. As Kevin watched, two metal tubes emerged through the slot.
As the realisation of what the tubes were struck home, Kevin rushed forward, shouting out a warning.
'Doctor! Look out!'
His words were drowned out by the sound of both barrels of the shotgun firing in unison.

[---]

Only lightning-fast reflexes saved the Doctor's life. As the gun fired, he threw himself to one side, landing hard on his shoulder and rolling back onto his feet in one smooth, fluid movement. A muffled curse came from inside the house.
Sprinting forwards, the Doctor grasped the barrel of the shotgun and yanked hard. There was a loud thump and a grunt of pain from the other side of the door. Immediately the Doctor released the gun and pressed his sonic screwdriver to the lock, slamming his shoulder against the door as he did so.
It crashed inwards, and there was another cry of pain as his assailant was thrown to the floor. The Doctor pushed his way inside. An elderly man lay in the flagstoned passageway clutching at his shoulder. The Doctor snatched up the shotgun and glared at him with distaste.