Doctor Who episodes have been written by several writers, not just by one. For a start, keep in mind that the series is now over 50 years old. For more information, you can find a list of episodes (and their writers, directors, and other information) on the Wikipedia, under the article "Doctor Who episodes".
A screenwriter writes scripts.
The Ninth Doctor had the scripts of his episodes released a few years ago in a book called Doctor Who: The Shooting Scripts
Yes and she also writes scripts
screen play writer
== == Gigi Eligoloff is the executive producer of "Big Brother."
you can buy the book 'The Shooting Scripts' which contains all the scripts of series 1.
The scripts for the first new series can be bought (http://www.play.com/Books/Books/4-/650734/Doctor-Who-The-Shooting-Scripts/Product.html) and the script for the pilot episode is on the "the begining" DVD.
An author writes a story about a historical king
It is anyone's guess.It is up to wwe management or whoever writes the scripts for the PPV.
Neil Gaiman does
No.There's only are series 1 shooting scripts
Medicine a doctor or specialist writes you for at a pharmacy.