S4, E11: Marlo reveals to Andy that she’s been watching suspected pedophile Kevin Ford for days. When Andy answers a home invasion call and finds Ford badly beaten, she fears the investigation will point back to Marlo. She contacts Swarek, who is stunned by the news and scrambles to cover Marlo’s tracks - recruiting Andy to help. Together, they keep the spotlight off Marlo long enough to find the assailant. But Swarek and Andy are left shaken by the day’s events -- and the choices they made. Meanwhile, Traci oversees a major drug sweep, with Chloe, Nick, Dov and Gail assisting. 15 Division is poised to break the single week record for drug collars, but when Sam leaves his post with Traci to help Marlo, the operation takes an unexpected turn. Traci reaches out to Steve Peck for help, and together they attempt to capture a ruthless gang leader.