Simone and Russell investigate two stickups held at ATM's where they get a line on a possible suspect and then use Kirkendall to appeal to the suspect's mother to help them reach out to him. Meanwhile, Medavoy attempts to sort out a case where he can't determine if there really is a twin when a man comes to the station to report that his twin brother, Pete, has threatened violence against his former girlfriend. Also, Sipowicz contends with a medical problem involving his prostate while helping Simone and Russell and he is less than forthcoming with what his doctor has told him about his condition. Also, a new administrative aide, named Delores Mayo, comes to work at the 15th Precient as Naomi's replacement.