Blue Bloods ( season 8 ) - wikipedia Blue Bloods ( season 8 ) Blue Bloods ( season 8 ) Country of origin United States No. of episodes 22 Release Original network CBS Original release September 29, 2017 ( 2017 - 09 - 29 ) -- present Season chronology ← Previous Season 7 List of Blue Bloods episodes The eighth season of Blue Bloods, a police procedural drama series created by Robin Green and Mitchell Burgess, premiered on CBS on September 29, 2017. The season is set to contain 22 episodes. Contents 1 Cast 2 Episodes 3 Ratings 4 References 5 External links Cast Donnie Wahlberg ( Danny Reagan ), Bridget Moynahan ( Erin Reagan ), Will Estes ( Jamie Reagan ), and Len Cariou ( Henry Reagan ) are first credited. Then Sami Gayle ( Nicky Reagan - Boyle ) credited next, marking the fourth season she has been included in the opening credits. Tom Selleck ( Frank Reagan ) receives an `` and '' billing at the close of the main title sequence. Amy Carlson ( Linda Reagan ) left between Seasons 7 and 8. Marisa Ramirez, as Danny 's partner Detective Maria Baez, and Vanessa Ray, as Jamie 's partner Eddie Janko, continue to receive `` also starring '' billing for season 8. Appearing regularly and receiving `` special guest star '' billing are Gregory Jbara as Deputy Commissioner of Public Information Garrett Moore, Robert Clohessy as Lt. Sidney Gormley, and Abigail Hawk as Detective Abigail Baker, Frank 's primary aide. Episodes No. overall No. in season Title Directed by Written by Original air date Prod. code U.S. viewers ( millions ) 156 `` Cutting Losses '' David M. Barrett Siobhan Byrne O'Connor September 29, 2017 ( 2017 - 09 - 29 ) 801 10.04 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 ). 157 `` Ghosts of the Past '' John Behring Kevin Riley October 6, 2017 ( 2017 - 10 - 06 ) 803 9.49 Frank receives an order from the mayor to attend the annual West Indies parade, which this year is honoring a man who served time for conspiring in an attack against the police. Meanwhile, Danny and Maria investigate the return of Selena Moore ( Caroline Pluta ), who suspiciously disappeared as a teen 13 years ago. Also, Jamie and Eddie try to help a young woman they believe is being exploited by Congressman Richard Walters ( Richard Thomas ). 158 `` The Enemy of My Enemy '' Robert Harmon Ian Biederman October 13, 2017 ( 2017 - 10 - 13 ) 802 8.98 Erin 's case against human trafficker Chao Lin ( Tia Carrera ) faces difficulty when the presiding judge falls off a roof to his death. Erin, who happens to be the one obsessed about winning all the time, is hell bent on trying to prove it was a murder and she demands Danny to lead the investigation in that assumption, despite her saying no to him several times in the past whenever Danny asked for her professional help. Being a control freak, Erin goes to the extent of ven imposing one of her guys into the investigation to make sure it proceeds exactly in the way she wants it to proceed. Danny and Baez cooperate, while also trying to protect a key witness for the prosecution. Elsewhere, Frank 's enhanced public safety initiative is opposed by Mayor Dutton, but gains a surprising ally, City Council Speaker Regina Thomas ( Whoopi Goldberg ). 159 `` Out of the Blue '' David M. Barrett Brian Burns October 20, 2017 ( 2017 - 10 - 20 ) 804 9.08 Danny and Baez work the case of a detective who was gunned down prior to testifying against a career criminal. Also, Frank personally investigates when Garrett is attacked by a SWAT team outside his home, and Erin brings in a confidential informant against Anthony 's wishes. 160 5 `` The Forgotten '' Ralph Hemecker Allie Solomon October 27, 2017 ( 2017 - 10 - 27 ) 805 TBD 161 6 `` Brushed Off '' Eric Laneuville Daniel Truly November 3, 2017 ( 2017 - 11 - 03 ) 806 TBD 162 7 `` Common Ground '' David M. Barrett Siobhan Byrne O'Connor November 10, 2017 ( 2017 - 11 - 10 ) 807 TBD 163 8 `` Pick Your Poison '' TBA TBA November 17, 2017 ( 2017 - 11 - 17 ) 808 TBD Ratings No. Title Air date Rating / share ( 18 -- 49 ) Viewers ( millions ) DVR ( 18 -- 49 ) DVR viewers ( millions ) Total ( 18 -- 49 ) Total viewers ( millions ) `` Cutting Losses '' September 29, 2017 1.1 / 5 10.04 0.7 4.57 1.8 14.60 `` Ghosts of the Past '' October 6, 2017 1.0 / 4 9.49 0.7 4.18 1.7 13.67 `` The Enemy of My Enemy '' October 13, 2017 0.9 / 4 8.98 0.6 4.13 1.5 13.11 `` Out of the Blue '' October 20, 2017 0.9 / 4 9.08 TBD TBD TBD TBD 5 `` The Forgotten '' October 27, 2017 TBD TBD TBD TBD TBD TBD 6 `` Brushed Off '' November 3, 2017 TBD TBD TBD TBD TBD TBD 7 `` Common Ground '' November 10, 2017 TBD TBD TBD TBD TBD TBD 8 `` Pick Your Poison '' November 17, 2017 TBD TBD TBD TBD TBD TBD References Jump up ^ Andreeva, Nellie ( March 23, 2017 ). `` CBS Renews 5 Freshman & 11 Returning Series, Including ' MacGyver ', ' Superior Donuts ', ' Life In Pieces ' & ' Hawaii Five - O ' ''. Deadline Hollywood. Archived from the original on March 23, 2017. Retrieved March 23, 2017. Jump up ^ `` CBS Announces Fall 2017 - 2018 Primetime Premiere Dates ''. CBS. ^ Jump up to : Porter, Rick ( October 2, 2017 ). `` ' Hell 's Kitchen ' premiere adjusts up : Friday final ratings ''. TV by the Numbers. Retrieved October 2, 2017. ^ Jump up to : Porter, Rick ( October 9, 2017 ). `` ' Hawaii Five - 0 ' and ' Hell 's Kitchen ' adjust up, ' Exorcist ' adjusts down : Friday final ratings ''. Retrieved October 9, 2017. ^ Jump up to : Welch, Alex ( October 16, 2017 ). `` ' Hell 's Kitchen, ' ' MacGyver, ' ' Once Upon a Time, ' & more remain unchanged : Friday final ratings ''. TV by the Numbers. Retrieved October 16, 2017. ^ Jump up to : Porter, Rick ( October 23, 2017 ). `` ' Jane the Virgin, ' ' Hawaii Five - 0, ' all others unchanged : Friday final ratings ''. TV by the Numbers. Retrieved October 23, 2017. Jump up ^ `` ( # BB805 ) `` The Forgotten '' ``. The Futon Critic. Retrieved October 9, 2017. Jump up ^ `` ( # BB806 ) `` Brushed Off '' ``. The Futon Critic. Retrieved October 12, 2017. ^ Jump up to : `` Shows A-Z - blue bloods on cbs ''. The Futon Critic. Retrieved October 20, 2017. Jump up ^ Porter, Rick ( October 13, 2017 ). `` ' This Is Us ' and ' The Good Doctor ' score big in premiere week broadcast Live + 7 ratings ''. TV by the Numbers. Retrieved October 15, 2017. Jump up ^ Porter, Rick ( October 18, 2017 ). `` ' The Orville, ' ' Once Upon a Time, ' 5 more shows double in week 2 broadcast Live + 7 ratings ''. TV by the Numbers.com. Retrieved October 18, 2017. Jump up ^ Porter, Rick ( October 25, 2017 ). `` ' The Good Doctor ' is the most - watched show on TV in week 3 broadcast Live + 7 ratings ''. TV by the Numbers. Retrieved October 25, 2017. External links Official website List of Blue Bloods episodes on IMDb List of Blue Bloods episodes at TV.com Blue Bloods Characters Episodes Season 1 5 6 7 8 Retrieved from `` https://en.wikipedia.org/w/index.php?title=Blue_Bloods_(season_8)&oldid=807406343 '' Categories : 2017 American television seasons Blue Bloods ( TV series ) Hidden categories : Official website not in Wikidata Talk Contents About Wikipedia Add links This page was last edited on 27 October 2017, at 19 : 04. Text is available under the Creative Commons Attribution - ShareAlike License ; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia ® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization. About Wikipedia

Question: who plays the mayor on season 8 of blue bloods
Answer: Lorraine Bracco