Donna returns home where Wilfred gets trapped in one of the Atmos cars
Luke Rattigan runs an academy and works on his secret technology.
UNIT investigates the ATMOS factory.
The UNIT team clears the factory floor.
The Doctor and Ross are driving back from the academy when their jeep is taken over by the Atmos system.
Jo Nakashima is driving back from the academy when the Atmos system takes over her car and crashes it into the water.
Shoppers respond to the activating ATMOS systems.