S13, E20: Detectives Benson (Mariska Hargitay) and Amaro (Danny Pino) investigate the disappearance of a teenaged girl after her young brother calls 9-1-1. While Fin (Ice-T) and Rollins (Kelli Giddish) look into a possible abduction, they discover the girl had been searching for her biological father, an anonymous sperm donor. The investigation takes a startling turn when a suspect is found to be targeting several young, vulnerable women, all with the same personal connection. But the suspect isn’t what he seems, and Dr. Huang (BD Wong) must delve into his past to save the women. Guest Starring Eric Close and James Van Der Beek. Also starring Richard Belzer (Sergeant John Munch.)