Marriage is hard. Marriage between two spies is even harder. But it certainly makes for good onscreen entertainment. And so we have Steven Soderbergh's latest film "Black Bag," starring Michael Fassbender and Cate Blanchett as two high-level spies who are married to each other.

So goes much of the crackling patter of “Black Bag,” Steven Soderbergh’s delicious marital drama cloaked as a sleek spy thriller. Lean and taut, the 93-minute “Black Bag” is more a sizzling amuse-bouche than full-course meal, but it’s simmered to perfection.