The world is in the grip of a second Ice Age and faces total destruction from the rapidly advancing glaciers. The Doctor, with Victoria and Jamie, lands at a top scientific base in England where they’ve just unearthed an ancient, Martian Ice Warrior. Preserved in the ice for centuries and now revitalised, the Ice Warriors are ready to take over.  Can the Doctor overcome these warrior Martians and halt the relentless approach of the glaciers?