Series: 9

Original Air date:  September 26, 2015

Number Doctor: 12th

Companion(s): Clara Oswald

Writer(s):   Steven Moffat

Director(s):  Hettie MacDonald

Guest Stars:
Michelle Gomez as Missy
Julian Bleach as Davros
Jami Reid-Quarrell as Colony Sarff

Synopsis: Trapped and alone in a terrifying Dalek city, the Doctor is at the heart of an evil Empire; no sonic, no TARDIS, nobody to help. With his greatest temptation before him, can the Doctor resist? And will there be mercy?

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