18th century

Trends

 * The emergence of the first modern democracies in the United Kingdom, America, and France (DW: The Reign of Terror)


 * The beginning of the Industrial Revolution on Earth, which may have been inspired by Azal (DW: The Dæmons).

Un-dated events

 * Weed Creatures were first seen along the North Sea coast at this time (DW: Fury from the Deep).
 * The Doctor ran Taunton for two weeks in this century and complained that he'd never been so bored (NA: The Highest Science)
 * Towards the end of the century, Cuthbert Simpson is sent by the Time Lords to Banquo Manor. (EDA: The Banquo Legacy)

Decades

 * 1700s
 * 1710s
 * 1720s
 * 1730s
 * 1740s
 * 1750s
 * 1760s
 * 1770s
 * 1780s
 * 1790s