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.

No one lies like a spy. That, essentially, is the idea behind “Black Bag,” a tight, taut and highly stylish espionage thriller in theaters this week. In the latest film from director Steven Soderbergh,

In Steven Soderbergh’s latest caper, Cate Blanchett and Michael Fassbender prove that monogamy is no mission impossible.