Argo is further proof, after the excellent Gone Baby Gone and efficient The Town, that Ben Affleck is an accomplished film-maker. The 1979 Iranian hostage crisis is the catalyst for this bizarre true story, in which a CIA agent (Affleck) sets up a fake fantasy film in order to smuggle six Americans, hiding at the Canadian embassy, out of Tehran. He recruits a foul-mouthed producer (Alan Arkin …