A real gem of an Italian movie is on offer in this instalment of You Should Watch This. Simon pitches Elio Petri's Investigation of a Citizen Above Suspicion - an enthralling political satire which isn't so much a whodunit as a "whydunit". The police inspector (Gian Maria Volonté) kills his lover in the opening scene and then spends the rest of the film trying to line up clues pointing towards his own guilt - much to the incredulity of the investigating officers. Expect an incredible Ennio Morricone score, political intrigue and lively discussion from Ed and Simon.