Logan Crawford

Danny contemplates retiring until Erin enlists him to help her with a case involving her ex-husband, Jack (Peter Hermann). Also, Jamie and Eddie go undercover as a couple, and Frank butts heads with the new mayor of New York City, Margaret Dutton (Lorraine Bracco).

Baez gets injured while escorting confiscated drugs, so Danny goes after the drug cartel responsible. Elsewhere, a lieutenant with a commendable record engages in controversial behavior, putting Frank in a difficult situation.

Things get personal for Danny when Luis Delgado (Lou Diamond Phillips), the drug cartel hitman responsible for torching his house, resurfaces. Also, an attack on an officer in the line of duty directly impacts a member of Frank’s team; Eddie reluctantly introduces Jamie to her mother, Lena (Christine Ebersole); and Erin deals with the consequences of her new role as boss.

Danny and Maria must track down an Army veteran who Danny thinks is suffering from PTSD. Meanwhile, Frank is caught off-guard during a press conference by a woman who is seeking justice for her murdered daughter. Karen Allen guest and Doug E. Doug guest star.

Reese and Finch scramble to protect a software CEO (guest star Aasif Mandvi) when his behavior becomes increasingly erratic, following a hacker attack that reveals all his secrets and unravels his life.