The Ben Affleck career renaissance continues apace with this masterfully measured and understated piece of directing, which adapts the so-bizarre- it-can-only-be-true story of a fake movie used as cover for a CIA rescue operation, into an old-school '70s-style political thriller laced with shades of self-reflexive Hollywood satire. Argo successfully balances scenes of seat-gripping tension and joyously grouchy humour that feels effortless but takes a sure hand to pull off. Minor historical inaccuracies have to be swallowed along the way for the benefit of snappier pacing. But overall this remains a fascinating true story, delivered with great performances, pin-sharp dialogue and award-winning facial hair, and would make a fine double-bill with the underrated Charlie Wilson's War. The new Eastwood? ...maybe.