“ Black Bag ,” an elegant, quick-witted new thriller that finds Cate Blanchett and Michael Fassbender playing married spies, isn’t the pair’s first time together on screen. That honor goes to 2017’s “Song to Song,” one of Terrence Malick’s most intangible and head-scratching offerings — though the two stars can barely recall that experience.

Cate Blanchett, Rege-Jean Page and Pierce Brosnan also star in the Steven Soderbergh movie that is one of the director’s recent bests.

Michael Fassbender cannot lie — the polygraph scene in Black Bag was a bear for him to shoot.