Lauren Kelly

When a weapon linked to a crime is brought into the NYPD's gun buyback program, Danny must decide whether to arrest the suspect or follow the "no questions asked" policy.

A major shootout leaves two patrol cops and an 18-year-old neo-Nazi dead, with lots of unanswered questions as to what happened and who else might have been involved. The investigation is made all the more difficult by the involvement of Captain Sharon Raydor (recurring guest star MARY McDONNELL) of Force Investigation Division, which is responsible for looking into shooting incidents involving officers.

The investigation into a home invasion that ended with two dead leads to a shocking revelation about Detective Rollins.

A rogue FBI agent takes Dr. Ellen Sanders hostage after she is chosen to operate on the president, threatening to kill her and her family unless she assassinates him during the surgery.

Duncan informs Ellen that her refusal to assassinate the president will cost her a loved one's life; the family learns it will be monitored by Duncan's men until the operation.

Ellen and Brian try to take down Duncan; Archer's accomplice plans to reveal information to the assistant district attorney about a murder.