Erin pleads with Danny, who has been contemplating retirement since Linda 's death in a rescue helicopter crash, to help her with a case involving her ex-husband, Jack (Peter Hermann); Jamie and Eddie go undercover as a couple to bust a shady drug dealer; Frank butts heads with new mayor Margaret Dutton (Lorraine Bracco).
who plays the mayor on season 8 of blue bloods
Lorraine Bracco