A close second behind The 39 Steps as the best film of Alfred Hitchcock's British period, this sublime comedy thriller was co-scripted by Alma Reville (Mrs Hitchcock) and the dynamic duo of Frank Launder and Sidney Gilliat. There isn't a wasted frame, as Michael Redgrave and Margaret Lockwood search a Balkan express train for dotty Dame May Whitty. Basil Radford and Naunton Wayne drew all the plaudits as the cricket-mad Charters and Caldicott, but the support playing of Paul Lukas, Mary Clare and Cecil Parker is also first class. Hitchcock cameo fans should keep their eyes peeled during the London station scene.