Mannion investigates the murder of a man during a Civil War reenactment. While Temple takes the matter personally when one of the suspects turns out to be a big-time racist, it's Noland who, trying to find a connection between him and a man in an old picture, discovers a rivalry between the prime suspect and the victim that dates back to the Civil War days. Meanwhile, Debreno and Regan are out testing a new bait car that almost causes the death of a car thief.