The BBC have released a synopsis for episode five of Series 9, The Girl Who Died, penned by Jamie Mathieson, and guest starring Maisie Williams. You can read the synopsis below:
Captured by Vikings, the Doctor and Clara must help protect their village from Space Warriors from the future: the Mire. Outnumbered and outgunned, their fate seems inevitable. So why is the Doctor preoccupied with a single Viking girl?
The Girl Who Died airs on Saturday 17th October on BBC One.