- Donnie Wahlberg as Det. Danny Reagan
- Bridget Moynahan as A.D.A. Erin Reagan-Boyle
- Will Estes as Officer Jamie Reagan
- Len Cariou as Henry Reagan
- Amy Carlson as Linda Reagan
- Sami Gayle as Nicky Reagan-Boyle
- Tom Selleck as P.C. Frank Reagan
- A mentally ill man who was threatening the pedestrians is tasered after he doesn't calm down, which leads to his death by a small van.
-Meanwhile elsewhere Officer Jamie Reagan and Edit Jenko respond to a domestic dispute call which results in officer Jamie beating up the man who attacked his partner.
- Detective Danny Reagan and Maria Baez are getting ready to escort a confiscated shipment of drugs to a safe location when they are attacked causing Baez to be injured and the shipment being stolen.
- Back at the precinct Jamie deals with the consequences of his action and has to choose between his feelings and his career.