Sean Cullen

Danny tries to find the source of a deadly narcotic after three teenagers die from an overdose.

Tony revisits his days as a detective in Baltimore after learning that his former partner is likely the latest victim of the port-to-port killer.

As Peter's trial begins, Alicia works desperately to keep her husband from returning to jail. Also, Diane and Lucca move aggressively to expand the law firm, but face serious opposition from David Lee.