Bobby, Diane (and later Andy) investigate two stickup murders held at ATMs. When they get a line on a possible suspect, they use Jill to appeal to his mother to help them reach out to him. Meanwhile, Greg attempts to sort out a case where he can't determine if there really is a twin, when a man comes in to report that his twin brother has threatened violence against his former girlfriend. All along, Andy contends with a medical problem involving his prostate and he is less than forthcoming with what the doctor has told him about his condition. Sylvia tells Andy that she is ready to get back to work.