Henry V

 was the King of England during the early 15th century. While waiting for the Battle of Agincourt, he encountered the First Doctor, Ian, Barbara and Susan. They convinced him they were sent from God to help him win the battle. (PROSE: The Reign Makers)

Behind the scenes

 * He was played by Jonathan Firth in the BBC version of Henry IV and Martin Clunes in The Nearly Complete and Utter History of Everything.