Ace learns the identity of her mother

Tags: Seventh Doctor, Ace, Haemovores

The Curse of Fenric, episode 4
15 November 1989

Now released and inhabiting the body of Captain Sorin, Fenric fools Ace into solving the Doctor's chess puzzle. But the ancient evil has another surprise - the secret of who Ace is and where she really comes from. Will it shake her faith in the Doctor?