Doctor Who: Martha In The Mirror

Castle Extremis is a tense story set around a centuries-old conflict and the upcoming signing of a peace treaty at its fortified center. As the Doctor and Martha arrive, they uncover mysterious secrets involving a haunting girl, a glass-constructed book, and a legendary mirror, all while facing threats that could plunge the castle back into war. With time running out, they must uncover the truth before the castle is besieged once more.