A traitor threatens to undo British Intelligence's sexiest marriage in a fun Soderbergh movie about what lies at the heart of any good relationship.

The movie arrives only two months after Soderbergh's last movie Presence, a unique spin on a haunted house movie. He's not that fast of a filmmaker, it's just a quirk of release scheduling, but if Black Bag is the result, then even two months is too long to wait.

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,