John Hurt (in-universe)

Toshiko Sato compared the hole in the skeleton of a 19th century soldier to "that bit in Alien where that thing bursts out of John Hurt". (TV: Greeks Bearing Gifts)

Information from invalid sources
Whilst introducing The Day of the Doctor to an unseen audience, Strax mentioned that John Hurt returned to the role of the Doctor. (NOTVALID: Strax Saves the Day)