Air: Nov 11 1967. 6 eps, 2 and 3 lost.
The crew arrives in the future where the world is surviving a second ice age. Deep within the glacier, they find a group of alien beings frozen. Once they thaw out, they plan to regain power to their ship to either return to their planet or worse to conquer this one. Can The Doctor convince the people to stop relying on a computer to make the decisions for them and think for themselves?