18th century

The 18th century was notable for the emergence of the first modern democracies in the United Kingdom, America, and France. (TV: The Reign of Terror) It also marked the beginning of the Industrial Revolution, which may have been inspired by Azal. (TV: The Dæmons)

During this century:
 * Weed creatures were first seen along the North Sea coast. (TV: Fury from the Deep)
 * The Doctor ran Taunton for two weeks and complained that he'd never been so bored. (PROSE: The Highest Science)
 * The Doctor learned to cook in Paris. (TV: The Lodger)
 * Cuthbert Simpson was sent by the Time Lords to Banquo Manor. (PROSE: The Banquo Legacy)

It was also among the centuries endured by "Lady Me", formerly known as Ashildr, 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 medical kit. (TV: The Woman Who Lived)