Sir Donald Alfred Sinden CBE FRSA (9 October 1923 – 12 September 2014) was an English actor in theatre, film, television and radio as well as an author. His brother Leon, also an actor, appeared in the 1980 film Why Didn't They Ask Evans?.
He played Sir Henry Clithering in the Agatha Christie's Marple episode The Blue Geranium.
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- 1996 - BBC Radio, Death on the Nile as Colonel Johnnie Race
- 2002 - BBC Radio, Cards on the Table as Colonel Johnnie Race
- 2004 - BBC Radio, The Adventure of the Christmas Pudding as Colonel Lacey
- 2010 - Agatha Christie's Marple, The Blue Geranium as Henry Clithering