When Mackey and Vendrell hook up with a cop from another precinct to investigate the shooting, Vendrell sets off an explosive confrontation with a suspect by making a racial slur. And Mackey seldom a paragon of restraint defuses the situation. But be... (more)fore this tense hour is over, Mackey's complex relationship with Vendrell becomes even more complicated. Meanwhile, Dutch and Wyms search for a serial killer and bring in a psychic on a complaint from the son of one of her clients, and David calls internal affairs after getting Julien's affidavit.

April Grace, Brent Roam, Carlos Sanz, Davenia McFadden, Dee Freeman, John Diehl, Kimberly McCullough, Lance E. Nichols, Miguel Perez, Rick Gonzalez