'Lost' is rather like one of those old 1950s public information films - the acting and dialogue are crisp and stylised, real emotion is kept in check, and the boys in blue will always uncover your man (or woman). Brilliant use is made of UK locations (mainly in London), and the slice of life in 1955 is fascinating. Technicolor is also superb, and the whole thing looks great. It's dated sure - sometimes hilariously so - but then it is half a century old, and anyway that's half its charm. Red herrings litter the plot, and the clifftop climax is suitably atmospheric. Look out for a very youthful Thora Hird and Joan Sims. Recommended.