Josh Tower

Danny investigates when a doorman at a nightclub is murdered; Frank makes a decision about a former partner's future.

When an armed robbery ends with the death of a police officer, Frank makes it a mission for the NYPD to bring the suspect to justice. However, tensions run high in the Reagan household when Erin drops the charges and releases the suspect due to lack of evidence.

When Erin's informant is murdered, she can't help but blame herself for the death and work to help Danny discover who killed him; Frank deals with public backlash against an officer.

A 10-year-old girl taken from her mother at the U.S.-Mexico border ends up in a sex-trafficking ring in New York, and Benson and Stone fight to reunite the girl with her mother; Rollins confesses to her ex.