Julian Acosta

While the police suspect a drug dealer on trial is behind the murders of the State's witness in his case, as well as his girlfriend, Patrick Jane sees a different motive for the crime -- as well as a different suspect.

The International Response Team is investigated by the FBI after a mission in Kurjikistan results in the death of a suspect.

Castle finds himself vying with an FBI agent for Beckett's attention when she is called in to help the agency investigate a little girl's disappearance from her home.

Elizabeth takes on an unexpected position of power when the president's plane is declared missing; Henry's new handler asks him to recruit one of his students for the NSA.

The president's administration encounters hostility while dealing with the Russian government; Dmitri is kidnapped and interrogated about being a spy.

Following President Ostrov's death, President Dalton and Elizaeth fear an impending power grab within the Russian government; Jay forms a plan to combat Russian propaganda.