Exhibition of the week Cézanne Portraits The searching and profound portraits of Paul Cézanne are the greatest painted in modern times. • National Portrait Gallery, London, 26 October to 11 February. Also showing Age of Terror: Art since 9/11 Artists including Jake and Dinos Chapman and Gerhard Richter respond to the anxieties of our time. • Imperial War Museum, London, 26 October to 28 May. Starless Midnight Season Butler, Karon Davis, Charles Gaines and Cauleen Smith are among the artists in this exhibition inspired by the legacy of Martin Luther King. • Baltic Centre for Contemporary Art, Gateshead, until 21 January. Pioneers of Pop The great Richard Hamilton leads this survey of the origins of pop art. • Hatton Gallery, Newcastle, until 20 January Wildlife Photographer of the Year This ever-popular gathering of new images of nature returns. • Natural History Museum, London, until 28 May. Masterpiece of the week |