Amazing Grace

"Amazing Grace" was a piece of music. At Walker General Hospital on 30 December 1999, when Curtis asked who was working cardiology that night, Salinger replied "Amazing Grace", alluding to Grace Holloway. (TV: Doctor Who) The Twelfth Doctor was able to play "Amazing Grace" on his electric guitar. (TV: The Zygon Invasion) The leader of the Jehovah's Witnesses suggested a variation of it for the god of the Krikkitmen. (PROSE: Doctor Who and the Krikkitmen)