The Ice Warriors' attempt to revive their forces and conquer Earth, opposed by the Doctor and his companions.

In the Ioniser Control Room, Arden transmits a critical discovery from the glacier site: the ice face has been meticulously excavated into a cave, suggesting deliberate and unnatural intervention. His …

The Doctor’s companions—Arden, Jamie, and Victoria—enter the glacier cave to investigate the Ice Warriors’ activity, only to be ambushed by Varga and his forces. Arden is killed instantly by an …