Several credibility gaps diminish what could have been an intriguing action thriller. For example: The good guys crash a barricaded building by smashing an SUV through a window. After the guards blast it with machine gun fire, they open the doors, only to discover that the vehicle is empty. The screenplay never explains how they got out. And there is no way they could have jumped out without being noticed. I guess the producers figure we are just too stupid to question it. And that’s just one example. Another problem is the overwhelming amount of violence this film contains. With elements of “Logan’s Run” and “The Running Man,” plus an engaging performance by Mr. Roberts, this was on its way to being an entertaining film. Alas, it becomes little more than a violent, implausible depiction of a bleak future, where lawbreakers save the world.