sentences:  The Third Doctor's final story was to be "The Final Game" by Robert Sloman and Barry Letts as an uncredited co-writer which was commissioned on 15 February 1973.The story was to end with the reveal that the Master and the Doctor were brothers or two different, opposing aspects of the same being (the Ego and the Id), and the Master dying in a manner which suggested that he sacrificed himself to save the Doctor's life.The actor who played the Master, Roger Delgado, was killed in a car accident in Turkey on 18 June 1973, forcing the scrapping of the story.