‘Sicario’ is an exercise in prolonged tension like few others. Every moment from the first scene to the last is suspenseful. The opening, a deadly raid on a drug kingpin’s safe house establishes a terrifying precedent: In this film, violence can erupt at any time without any warning, and no one and nothing can be trusted. Having thoroughly unsettled the audience, director Denis Villeneuve keeps viewers on edge with shifty characters, sudden bursts of gunfire, and the careful use of a persistent, pounding score. Remember the scene in Boogie Nights where Alfred Molina is randomly tossing firecrackers at Mark Wahlberg and John C. Reilly? Sicario is like that scene for two straight hours with no “Sister Christian.” It is intense.