Agnes Brown

Agnes Brown attended a Christmas party with the Eleventh Doctor, Amy Pond, and a host of other BBC stars. (NOTVALID: Consider Yourself One Of Us...)

On another occasion, she entered the Doctor's TARDIS and accidentally stole it. The TARDIS later returned her to her right place in time. (NOTVALID: It's Showtime)

Behind the scenes
Agnes is the titular character of the BBC sitcom, Mrs. Brown's Boys.