The Final Game (unproduced TV story)

✅ The Final Game was an unproduced serial intended to end Season 11. It would have revealed that the Third Doctor and the Master were actually two aspects of the same Time Lord with the Master as either the evil side of the Doctor's personality or his brother, explaining why the Master never sought to actually kill the Doctor. It would have ended with the Master sacrificing his life for the Doctor then the Doctor regenerates. However, the episode was never produced due to the death of Roger Delgado (the Master) and Planet of the Spiders replaced this story as the final episode for Jon Pertwee (Third Doctor).