Series: 9

Original Air date:  October 31, 2015

Number Doctor: 12th

Companion(s): Clara Oswald

Writer(s):   Peter Harness

Director(s):  Daniel Nettheim

Guest Stars:
Ingrid Oliver as Osgood
Jemma Redgrave as Kate Stewart
Rebecca Front as Colonel Walsh
Jaye Griffiths as Jac
Cleopatra Dickens as Claudette
Sasha Dickens as Jemima
Todd Kramer as Hitchley
Jill Winternitz as Lisa
Gretchen Egolf as Norlander

Synopsis: The fragile peace between the Humans and the Zygons is on a knife edge. Tensions run high as factions within the Zygon community seek to incite violent action against Humans. Called in by UNIT, the Doctor and Clara fight to bring the situation under control. But one question remains: Where on Earth is Osgood?

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