S2, E12: Jack and the team search for Joe Gibson (Jerry O'Connell - Kangaroo Jack, Mission to Mars), who disappeared after a chase and gunfight with unidentified figures. But as they learn more about Joe, who worked as a public defender, the squad members become convinced that he is a paranoid schizophrenic and poses a danger to himself and others. Jack's training in psychology becomes crucial as they track him down through a variety of associates, many of whom are worried about Joe's sanity. And when a little girl is reportedly abducted by the delusional Joe, the investigation becomes even more intricate and urgent.