"Sleep No More" is the ninth episode of the ninth series of the British science fiction television series Doctor Who. It was first broadcast on BBC One on 14 November 2015. It marked the first time an episode of the series had not featured any opening titles - the title and writer were instead announced at the beginning of the end credits.

The ninth series of the British science fiction television programme Doctor Who premiered on 19 September 2015 with "The Magician's Apprentice" and concluded on 5 December 2015 with "Hell Bent". The series was led by head writer and executive producer Steven Moffat, alongside executive producer Brian Minchin. Nikki Wilson, Peter Bennett, and Derek Ritchie served as producers. The series is the ninth to air following the programme's revival in 2005, and is the thirty-fifth season overall.