The Tenth Doctor and Martha Jones were fans of the Potter books, and the Doctor admitted to crying after reading the seventh volume. Later, when Potter's spell "expelliarmus" was given life in order to help William Shakespeare defeat the Carrionites, the Doctor exclaimed, "Good old J.K.!" (TV: The Shakespeare Code)
Rowling wrote eleven Harry Potter books, which the Eighth Doctor had in his TARDIS. (PROSE: The Gallifrey Chronicles) He mentioned this to Izzy Sinclair, but she didn't know who Rowling was. (AUDIO: Izzy's Story)
Behind the scenes
- In The Tomorrow Windows her name is given as Joanne Rowling, the name used on the first publishing of the first Harry Potter book. In 2004, when The Tomorrow Windows was written and set, her married name was Joanne Murray and her pen-name was J.K. Rowling.
- In 2005 Russell T Davies asked Rowling to write for Doctor Who. She said she "was amused by the suggestion but simply [didn't] have the time". She was writing the sixth Harry Potter novel at the time. 
- In his 2008 autobiography, A Writer's Tale, Davies reveals that he considered basing the 2008 Christmas special around a guest appearance by Rowling.