Donald Sumpter (born 13 February 1943 in Brixworth, England) is a British actor.
He has worked in film and television since the mid-1960s. This has included three separate appearances in Doctor Who, spanning from Patrick Troughton to Peter Capaldi, and the role of Maester Luwin in Game of Thrones.
- 1990 Rosencrantz and Guildenstern Are Dead as Claudius
- 1995 Richard III as Brackenbury
- 1996 Our Friends in the North as Commander Harold Chapple
- 2001: Enigma as Leveret
- 2002 K-19: The Widowmaker as Captain 3rd Rank Gennadi Savran
- 2005 The Constant Gardener as Tim Donohue
- 2007 Eastern Promises as Yuri
- 2011 The Girl with the Dragon Tattoo as Detective Inspector Gustaf Morell
- 2017 The Man Who Invented Christmas as Mr. Haddock/Jacob Marley
- 1968 Doctor Who as Enrico Casali in "The Wheel in Space"
- 1972 Doctor Who as Commander Ridgeway in "The Sea Devils"
- 1983 Bergerac as Roscoe in "Fall of a Birdman"
- 1989 Bergerac as Harry Tilson in "Second Time Around"
- 1992 Poirot as Alexander Bonaparte Cust (The ABC Murders)
- 1999 Great Expectations as Compeyson
- 2009 The Sarah Jane Adventures as Erasmus Darkening
- 2009-2010 Being Human as Kemp
- 2010 Merlin as The Fisher King in "The Eye of the Phoenix"
- 2011 Black Mirror episode "Black Mirror: The National Anthem" as Julian Hereford
- 2011-2012 Game of Thrones as Maester Luwin
- 2013 Atlantis as Tiresias
- 2015 Doctor Who as Rassilon in "Hell Bent"
- 2017 Peaky Blinders as Arthur Bigge
- 2019 Chernobyl as Zharkov