19th century

The 19th century was very important to the Doctor. His eighth incarnation once called 19th century England his favourite time and place, (PROSE: The Banquo Legacy) though his initial incarnation clearly preferred 18th century France. (TV: The Reign of Terror)

In this century, Sebastiene attempted to hunt down the Tenth Doctor. (PROSE: The Doctor Trap)

Ancestors of Gwen Cooper, who shared spatial genetic multiplicity with Gwyneth, settled in the Cardiff area. (TV: The Unquiet Dead, Journey's End)

It was also among the centuries endured by Ashildr, a 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 Girl Who Died)