Peter Ewart Ohm (4 April 1923 – 6 December 2016), known professionally as Peter Vaughan, was an English character actor known for many supporting roles in British film and television productions. He also acted extensively on stage.
He is perhaps best known for his role as Grouty in the sitcom Porridge and its 1979 film adaptation. Other roles included a recurring role alongside Robert Lindsay in the sitcom Citizen Smith, Tom Hedden in Straw Dogs, Winston the Ogre in Time Bandits, Tom Franklin in Chancer, and Mr. Stevens Sr. in The Remains of the Day. His final role was as Maester Aemon in HBO's Game of Thrones (2011–2015).
Source : Wikipedia
