Doctor Who (2005) Season 9 Episode 6 The Woman Who Lived

The Doctor returns to medieval England, where he meets a highwayman named Lady Me Ashildr. After The Doctor saves her life, Lady Me becomes immortal but is forced to live and watch those she loves age and die around her. The episode takes place over the course of several centuries, following the lives of Lady Me and The Doctor. They eventually reunite to stop a dangerous alien threat that is terrorizing the English countryside.

Throughout the episode, there is a strong focus on the nature of immortality and the toll it takes on a person's soul. Lady Me is both enamored and horrified by her newfound immortality, struggling to find a reason to continue living when everyone she cares about is inevitably taken away from her. Meanwhile, The Doctor is forced to grapple with his own mortality and the weight of his past mistakes.

The two characters have a deep and complicated relationship, with Lady Me serving as a foil for The Doctor's own struggles. Their conversations are both heartfelt and witty, showcasing the chemistry between actors Peter Capaldi and Maisie Williams.

Overall, The Woman Who Lived is a poignant and thought-provoking episode of Doctor Who, exploring themes of mortality, love, and what it means to live a meaningful life.