S2, E2: The rookies and training officers are called to a vicious bar brawl involving Patrick Murphy, an ex-cop and Oliver’s old friend. Andy and Gail are sent undercover as waitresses to help stop the trafficking of drugs in and out of the bar. But the job proves more dangerous than expected. In the course of protecting their cover, Gail gets fired from the bar and Andy is forced to continue the investigation alone. As she delves deeper into the seedy underworld of the bar, she puts herself at greater risk. When Patrick Murphy saves Andy’s life by shooting the main suspect in the drug trafficking, Oliver can’t shake the feeling that his old friend may have fallen farther from the blue line than he ever could have imagined.