Bosco, still angry with Yokas for expressing concerns that got him forced into therapy, gets a new partner, Ross, who advises him what to tell the therapist so that the sessions can come to a speedy conclusion. Yokas is partnered up with Gusler, who is still overwhelmed and intimidated by the job. Tatiana's son Sergei is almost beaten to death by Russian mobsters who kill five of his friends. Yokas and Gusler get the call, and Yokas skillfully manages to get the cooperation of a neighbor who witnessed the murders and is willing to identify the perps. On the basis of his statement, they are able to obtain warrants and set off to make the arrests. When Sully finds out what has happened to Sergei and who is responsible, he is outraged, and sets off with Davis to make an arrest, without calling for the backup Davis thinks is necessary. The Russian mobsters have also killed several members of a rival gang in a drive-by. When Bosco and Ross arrive at the scene, Bosco sees a familiar drug