"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. 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, on the seventh season finale of BLUE BLOODS, Friday, May 5 (10:00-11:00 PM, ET/PT) on the CBS Television Network. Pictured: Tom Select, David Ramsey Photo: David M. Russell/CBS ÃÂ©2017 CBS Broadcasting, Inc. All Rights Reserved | Episode 7.22 - The Thin Blue Line (Season Finale) | Promotional Episode Photos | Season 7 | blue-bloods | Gallery

SpoilerTV Image Archive | Gallery | blue-bloods | Season 7 | Promotional Episode Photos | Episode 7.22 - The Thin Blue Line (Season Finale) | "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. 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, on the seventh season finale of BLUE BLOODS, Friday, May 5 (10:00-11:00 PM, ET/PT) on the CBS Television Network. Pictured: Tom Select, David Ramsey Photo: David M. Russell/CBS ÃÂ©2017 CBS Broadcasting, Inc. All Rights Reserved

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