Adrian Greenwood (The Bells of Saint John)

Adrian Greenwood was an employee of Miss Kizlet whose Flickr was found by Clara Oswald using face-match. She used this information to discover where Kizlet's offices were.

On the orders of the Great Intelligence, Miss Kizlet reset him and all other employees to factory settings, and they returned to their true selves. (TV: The Bells of Saint John)