Now this is a heist! Anthony and Joe Russo ostensibly entered the picture with the directing gig for a third Captain America film, but they have actually stolen the show by helming the third, most ambitious Avengers movie. Their Captain America: Civil War (A) is full of delightful surprises, spending its first hour tracing geopolitical machinations and espionage as the embattled heroes contemplate a global accords to put self-controls on their unbridled power. The film explores the consequences of compromise, the bounds of brotherhood and the limits of vengeance in what crescendos to some of the most artful fight choreography and breakneck stunt work to have been committed to screen in a major superhero film. To both Marvel stalwarts and casual fans alike, there is ample accessibility into the multilayered narrative. There are also enough great actors stuffed into the epic to populate an Altman film or a ’70s disaster ensemble. Robert Downey, Jr., Scarlett Johansson and Anthony Macke are among the most impressive veterans; and Tom Holland and Chadwick Boseman add to the embarrassment of riches as an amusing Spider-Man and noble Black Panther, respectively, who become embroiled in the splinter cells of the saga. The movie is very entertaining when it goes full fan-boy: I really liked the enthusiasm Ant-Man (Paul Rudd) embodies in meeting Chris Evans’ Captain America. If there’s any complaint, it’s the blandness of Evans’ snoozy character across the equivalent of two trilogies. The cap’n may be the wrong guy to match wits with the wry hybrid who is half Tony Stark/half Iron Man. But everything comes together so well: I nearly expected a full-cast singalong to an Aimee Mann song. Overall, there’s a natural elegance and specificity to each heroes’ personal powers as they jigsaw their way into the nooks and crannies of their physical and emotional brinkmanship. By the time they’ve been battered and bewildered by the events of the Russo Brothers’ deft spectacle, they will convince you that preserving unswerving power for good is worth the fight. It’s a comic book caper on the surface with rousing rumbles, but its grace and gravitas run more than spandex deep.