1820

January

 * 29 - King George III of the United Kingdom of Great Britain and Ireland dies.

July

 * 3 - Florence Sundvik is born. (DW: The Curse of Fenric)

Unknown Date

 * A Dalek space capsule crashes in the mercury swamps of Vulcan. It will be discovered by Humans 200 years later. (DW: The Power of the Daleks)