Whether there is any baby Hartnell , I am not sure ; I am unsure of all my Doctor - voices except for Ten , and a lot of One 's mannerisms are very old - man in nature . Anyway , what I set out to write has very little bearing on what I did write . What I actually wrote , after discovering my frustration with explanations for the Master such as " the girl he was in love with ultimately caused it " ( TM George Lucas ) , " he was just always a bit evil and crazy " ( TM JK Rowling ) , and " he was bullied as a child " ( TM ... psychologists profiling serial killers ? ) , was my own origin story .

Question: What may have caused you to write something with very little bearing ?
Answer: It was hard to develop a certain character .None of the above choices .It was hard to develop an origin story for Ten .It was hard to develop the character named Hartnell .