Jane Marple

Miss Marple was a fictional detective created by Agatha Christie. She was unconsciously inspired to create the character by a meeting with Donna Noble and the Tenth Doctor in 1926, in which Donna made an anachronistic remark about Miss Marple, a character Christie hadn't created yet. (DW: The Unicorn and the Wasp)

When suggesting names for the abbey where the Gorgon was held, Sarah Jane mentioned Miss Marple. (SJA: Eye of the Gorgon)