S15, E17: Detective Amanda Rollins' (Kelli Giddish) addiction drives her to an illegal gambling club, where waitress Clare Wilson (returning guest star Stefanie Scott) recognizes her as a cop. To protect her job, Rollins strikes a deal with the club managers (guest stars Donal Logue and Sherri Saum) to make their illegal transgressions disappear. But when the debt isn't paid to their liking, she doubles down and loses, forcing Sergeant Benson (Mariska Hargitay) and Detective Tutuola (Ice-T) to suspect one of their own of an unthinkable crime.