21 October

On 21 October 1805, the Battle of Trafalgar was fought. At least two incarnations of the Doctor were present at the event. (PROSE: H.M.S. TARDIS, COMIC: Rough Waters) As a young man, Sir Edward Scrivener's butler Hill served aboard the HMS Temeraire during the battle. (AUDIO: The Ghosts of Gralstead)

In 1829, the Mermaid hit a coral reef in a storm. The ship was wrecked but none of the crew perished. (PROSE: Of the Mermaid and Jupiter)

In 2015, the Eighth Doctor and Lucie Miller visited London. (AUDIO: The Eight Truths)