For eons the Cybermen have been the scourge of the universe. But the leader of the Sisterhood of Logicians, Professor Kaftan (Leslie Joseph), is convinced that beneath the wastes of the planet Telos lies the Cybermen's darkest secret. Centuries ago they froze the Cyberwomen in tombs of ice in the ultimate act of Cybersexism. Kaftan is determined to free the Cybersisters and aid them in taking vengeance on their Cyberpatriarchal oppressors.

The Doctor and her companions know that unleashing the true might behind the Cyberrace would be the end of life in the galaxy.

Imagine a Cyberfleet that would actually ask for directions.

Based on a script by Kit Peddler & Gerry Davies, adapted for a twenty first century, non-sexist audience by Nicholas Briggs