To coincide with an exhibition at the Tate Modern in London, Jonathan Meades 's film traces the origins - and explores the meaning- of Surrealism, the art movement that flourished in the two decades between the wars with notables including Dali and Magritte as its main practitioners. DirectorFrancisHanly;ExecutiveproducerAnthonyWall (S)(W) See BBC Knowledge tonight at 11.05pm. plus The Monk at 1.25am