Who'd have thought Fox Faith, 20th Century Fox's new Christian entertainment division, would release a knockoff of Saw? Adapted from a novel by Ted Dekker, this popcorn thriller stars Marc Blucas as a divinity student receiving voice-distorted phone calls from a notorious “Riddle Killer” who likes to kidnap people, bolt time bombs to them, and deliver coded biblical clues that will defuse the bombs. The vile sadism of the Saw movies has been replaced by decorative references to Saint Augustine and Immanuel Kant, and there's a beautiful but brainy police profiler (Justine Waddell) on hand to dispense a thick layer of psychobabble. Robby Henson directed. PG-13, 105 min.