The creature from the caves, wounded and dangerous, is on the loose on Wenley Moor.
Investigating the caves, the Doctor is attacked by a dinosaur-like creature.
UNIT is summoned to Wenley Moor research station which is experiencing power losses.
The Auton invasion begins as shop dummies come to life and attack the public.
Scobie visits Auto Plastics, unaware that he has played into the hands of Channing.
Channing directs one of his Autons to recover a meteorite that has been found by UNIT.
The TARDIS takes the newly regenerated Doctor to Earth to begin his exile.