George Villiers

George Villiers, 1st Duke of Buckingham (28 August 1582-23 August 1628) was a minister and close friend of King Charles I. Buckingham once smuggled an English army into France to take Paris. He lost a swordfight to the Fifth Doctor and was forced to return to England.

The Doctor later told his companions Peri Brown and Erimem that Buckingham would meet his death at the hands of a Puritan assassin named John Felton. (BFA: The Church and the Crown)