S5, E9: Chaos reigns in the City of Angels when Cooper and Lucero are kidnapped and held hostage by a pair of "tweakers." All of our cops join the frantic search to find their brothers in blue before it is too late. While Sammy searches for Strokeface (guest star MARCELLO THEDFORD), Ben tries to throw him off the trail…while simultaneously dealing with an increasingly irrational Brooke.