To Protect and Serve

A murder in a park is witnessed by a 13-year-old boy, and the victim is his father. The shooter he describes turns out to be a man named Delgado (Armando Riesco), who was convicted of murder five years ago but completely disappeared. It turns out Delgado has been working as an informant for the Department of Homeland Security, whose representatives tell Frank that the NYPD must back off. Erin lets Danny know he can still pursue a murderer in his jurisdiction, and he brings in Delgado. At his arraignment, with Erin's ex-husband Jack representing him, Delgado takes a security officer's gun, locks down the courtroom, and holds several people hostage. In a heated scuffle, he shoots Erin in the shoulder, then makes his demands and says he will only talk to Danny. Danny is able to convince Delgado that he will have free passage to the airport to board a plane to the Dominican Republic, and he is able to lure him outside, but Delgado is holding a gun to an injured Erin. An old Reagan family secret helps Danny free Erin and shoot her captor. Elsewhere, Jamie disobeys a direct order from a new lieutenant, and is suspended. Frank refuses to use his influence to change the situation.