Appears in "Game of Thrones" (2011) with Sean Bean. Bean played Boromir in Peter Jackson's Lord of the Rings films, while Vaughan played Denethor - Boromir's father - in the BBC Radio drama.
Has appeared in three different film versions of The Crucible as a different character each time.
Has twice played a wheelchair-bound man in need of assistance in the restroom, once in Brazil (1985) and again in Death at a Funeral (2007).
His brilliant performance as Denethor in the BBC radio dramatization of "The Lord of the Rings" is considered by some to be the unsurpassed and defining portrayal of this character.