Professional ratings
Review scores
Source	Rating
Rotten Tomatoes (Tomatometer)	100%
Rotten Tomatoes (Average Score)	8.9
The A.V. Club	A-
Entertainment Weekly	B+
SFX Magazine
TV Fanatic
IGN	9.0
New York Magazine
Radio Times
Daily Mirror

"World Enough and Time" is the eleventh episode of the tenth series of the British science fiction television series Doctor Who. It is written by Steven Moffat, directed by Rachel Talalay, and was broadcast on 24 June 2017 on BBC One. The episode received overwhelmingly positive reviews from television critics.

In the episode, the Doctor (Peter Capaldi), Bill (Pearl Mackie), Nardole (Matt Lucas), and Missy (Michelle Gomez) answer a distress call from a gigantic ship trying to escape a black hole. It is the first episode of a two-part story which concludes in the following episode, "The Doctor Falls". "World Enough and Time" is the first multi-Master episode in the show's televised history, as it features both Missy, the character's latest incarnation, and an earlier version (John Simm) last seen in the 2009–2010 serial The End of Time. It also serves as an origin story for the Cybermen, and features the return of the original Mondasian Cybermen, last seen on-screen in the 1966 serial The Tenth Planet, which was the Cybermen's debut.

In the cold open, the Doctor emerges from the TARDIS onto a snowscape and collapses, beginning to regenerate.

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Wikipedia