Sean Cullen

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.

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.

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

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.

Peter rescues a woman from a house fire but becomes personally invested in the case for reasons from his past. As Megan begins her investigation, she is usurped by veteran arson investigator Ray Easton and his young colleague, Skip, who challenge her at every step. When Megan complains to her boss, the tension between the two women heats up more.

The DA's office asks Bull to assist them in their prosecution of a fraternity when a pledge accidentally drowns during a hazing incident.