Ashildr, a young Viking girl, died bravely helping the Doctor save the village she loved - so the Doctor used alien technology to bring her back to life. 'The Triple Knife' is a glimpse into the life of a woman who lived longer than anyone ever should - and lost more than she can even remember. It's...

Ashildr, a young Viking girl, died bravely helping the Doctor save the village she loved - so the Doctor used alien technology to bring her back to life. 'The Triple Knife' is a glimpse into the life of a woman who lived longer than anyone ever should - and lost more than she can even remember. It's a planet the Doctor has never seen.