10th century

The 10th century was not one that particularly interested the Doctor, his companions or his enemies.

It was perhaps most notable, at least in terms of British history, for the rise of King Athelstan of England, and his apparently good relations with King Hywel of Wales. (TV: Planet of the Dead)

It was also among the centuries endured by Ashildr, later known as "Lady Me", an 9th century Viking girl who was rendered effectively immortal when she was brought back to life by the Twelfth Doctor through a self-repairing Mire repair kit. (TV: The Woman Who Lived)