You may be looking for black magic. "Black Magic" was a song by Little Mix. The song was present on Bill Potts' Spotify playlist. (TV: Knock Knock) Behind the scenes Edit Although not mentioned by name, the song is recognisable. Retrieved from "https://tardis.fandom.com/wiki/Black_Magic?oldid=2679330" Categories: Songs from the real world Community content is available under CC-BY-SA unless otherwise noted.