"The Thin Blue Line" is the twenty second and final episode of the seventh season of Blue Bloods. After his theories about a serial killer are brushed off, Jamie investigates on his own. Meanwhile Danny helps confiscate millions in drugs and money from a Mexican cartel which makes his family a target. In credits order Donnie Wahlberg as Danny Reagan Bridget Moynahan as Erin Reagan Will Estes.. When Danny intercepts a shipment of several million dollars that was heading to a drug cartel in Mexico, he becomes a target when they come back for revenge. Also, Jamie works independently to track down a serial killer who preys on the elderly, and Mayor Poole (David Ramsey) confides in Frank that he plans to retire.
When Danny intercepts a shipment of several million dollars that was heading to a drug cartel in Mexico, he becomes a target when they come back for revenge. Jamie works independently to track down a serial killer who preys on the elderly.. The Thin Blue Line When Danny intercepts a shipment of several million dollars that was heading to a drug cartel in Mexico, he becomes a target when they come back for revenge. S7E22 42 min Pluto TV Movies and Shows in United States Blue Bloods