Question: what is the saddest black mirror episode?
Answer: U.S.S. Callister. ... , White Bear. Season 2, episode 2. ... , Metalhead. Season 4, episode 5. ... , Crocodile. Season 4, episode 3. ... , Arkangel. Season 4, episode 2. ... , Smithereens. Season 5, episode 2. ... , Black Museum. Season 4, episode 6. ... , White Christmas. Season 2, episode 4.