Every crew has weak links – including Avon Barksdale's. With the heat turned up in the high-rises, Daniels and McNulty turn to a higher authority in an effort to crack the case wide open. Brianna Barksdale joins her brother in their new "corporate digs"; Freamon and Bunk try to trace a crucial phone call from Philly; Pearlman and McNulty celebrate a successful "flip"; defenders haggle with the DA over plea-bargain scenarios, and D'Angelo envisions a life outside the drug culture – finally.