Sean Cullen

The detectives attempt to identify a body that was found floating in the Hudson River.

Authorities seek the person who beat to death a beloved community leader at his center in Harlem.

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.

When Morland offers to help get Joan and Sherlock reinstated as consultants to the NYPD, Sherlock questions his father's motives; Joan works with the FBI during the investigation of a triple homicide.