Series: 9
Original Air date: October 17, 2015
Number Doctor: 12th
Companion(s): Clara Oswald
Writer(s): Jamie Mathieson and Steven Moffat
Director(s): Ed Bazalgette
Guest Stars:
Maisie Williams as Ashildr
David Schofield as Odin
Simon Lipkin as Nollarr
Ian Conningham as Chuckles
Tom Stourton as Lofty
Alastair Parker as Limpy
Murray McArthur as Hasten
Barnaby Kay as Heidi
Synopsis: In a Viking village, a girl named Ashildr is about to make a desperate mistake. The Mire are the deadliest mercenaries in the galaxy, famed for showing no mercy and Ashildr has just declared war on them. The Doctor and Clara have 12 hours to turn a peaceful village into strong fighters, ready for the deadly Mire.