To that end, it’s telling that the most exciting brawl in “Parabellum” (with the possible exception of a knife fight in a Chinatown antiques store) maintains a more expansive vision, as Mr. Wick fights alongside Halle Berry and some four-legged sidekicks. Traveling to Casablanca for reasons that are never adequately explained, Mr. Wick meets up with an assassin named Sofia who owns a pair of well-trained Malinois dogs; like every other supporting character in this movie, there’s mixed blood between them, and she owes him something for some reason.