Ron Nakahara

Different Mistakes. Voight's new Internal Affairs handler proves to be suspicious of his actions, Voight must work with his former partner from the Gang Unit, Halsted enlists Jin to help him gather more information on Lonnie Rodiger, Olinsky takes Ruzek down a peg.

The detectives screen animal-rights activists for suspects in the killing of an AIDS researcher.

When Morland offers to help get Joan and Sherlock reinstated as consultants to the NYPD, Sherlock questions his father's motives; Joan works with the FBI during the investigation of a triple homicide.

A computer sting uncovers the possible mole in the CIA arms smuggling ring; Henry worries that the doomsday cult is drugging his embedded operative; Elizabeth and her staff come up with a plan for dealing with black rhino poaching in Namibia.