Joseph Gordon-Levitt dons a Panama hat and swills booze as a classic gumshoe investigating a murder mystery in sun-soaked Greece. Killer Heat, adapted from a short story by famed Norwegian author Jo Nesb, is chock-full of what you’d expect from an old-school detective story. There’s the requisite gorgeous “dame” with shady motives, her powerful husband, a controlling matriarch, and more twists than a bag of pretzels. The cheese factor runs a tad high, and the big reveal can be seen from a mile away, but the film keeps your interest with a likable lead and its pulpy delivery.