The Locked Room: Kieran brings Alexa another cold case: a family man named Alan Gillespie shot dead in a motel room, with the windows and door locked from the inside and the security chain in place. As Madison digs into Gillespie's past, she uncovers a business connection to Nikki Malone, a crook Alexa knows from her undercover work five years ago. Nikki has since gone straight, but Alexa has her doubts.