Tensions are high at UNIT HQ. The Brigadier and the Doctor are arguing over the latter's electricity use. Liz comes to HQ to hand out Christmas cards; she can hear the arguments and fails to convince Sergeant Benton to deliver her cards to the Doctor and the Brigadier. Liz and the Brigadier exchange cards. They discuss the Doctor; he doesn't have any family with which to spend Christmas. Liz had invited him to spend Christmas with her, but he refused. Members of UNIT enjoy their party. As a special surprise, the Doctor shows Liz a view of sunrise from orbit.