Overview:"Call it a crisis of leadership." -- Proposition Joe Brother Mouzone returns to Baltimore on a mission of revenge and casts a wide net in his search for Omar, who has his own plan. Colvin manages, for now, to put off a 'Sun' reporter inquiring about Amsterdam. Carver learns how much he doesn't know about good policing, while Pearlman and Daniels plead their case for a new kind of wiretap to Judge Phelan.