9. The Crossing

Reese and Carter are crossing town to deliver Alonzo Quinn to the FBI. Simmons alerts HR and several criminal groups of Reese's identity, limiting their means of movement. The two fight their way to, and break into, the city morgue. Simmons and Detective William Petersen ( Lee Tergesen ) capture and torture Fusco for the location of Carter's safe deposit box, which contains evidence against HR. To break Fusco, Simmons sends Lin ( Khalil Kain ) to kill his son Lee (Sean McCarthy); but Lin is killed by Shaw. Fusco breaks his own thumb to get free of the handcuffs, and kills Petersen.

Reese distracts the HR cops by killing or disabling all but one, leading him onto the street. Finch arranges for two honest policemen to arrest Reese to evade HR. Carter and Quinn reach FBI Headquarters. Quinn is charged with multiple offenses and HR gets disbanded, with the exception of a few rogue officers, including the now-fugitive Simmons. Carter, re-promoted to detective, releases Reese from police custody. Simmons fires on both Reese and Carter down the street. Carter shoots Simmons back, but he escapes, merely wounded. Severely injured, Reese holds a dying Carter in his arms as she loses consciousness.