Hayley Atwell's performance in this episode is astonishing. She deserves an Emmy for it. She's the center of this bittersweet bleak episode. You'll feel like being in a journey while she passes from one lovely scene to another that's extremely sad, even you'd cry in a creepy way with her, then moving to an awkward situation, then acting shocked, then being temporarily happy, then going mad, then becoming upset, then ending to be mature. This episode scores 10; firstly for her performance, and secondly for the writers and directors.