<Table> <Tr> <Th> No . overall </Th> <Th> No. in season </Th> <Th> Title </Th> <Th> Directed by </Th> <Th> Written by </Th> <Th> Original air date </Th> <Th> Prod . code </Th> <Th> U.S. viewers ( millions ) </Th> </Tr> <Tr> <Th> 156 </Th> <Td> </Td> <Td> `` Cutting Losses '' </Td> <Td> David M. Barrett </Td> <Td> Siobhan Byrne O'Connor </Td> <Td> September 29 , 2017 ( 2017 - 09 - 29 ) </Td> <Td> 801 </Td> <Td> 10.04 </Td> </Tr> <Tr> <Td colspan="8"> 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 ) who 's been attacked in his office . Jamie and Eddie go undercover as a couple to bust a shady drug dealer ; new mayor Margaret Dutton ( Lorraine Bracco ) butts heads with Frank . </Td> </Tr> <Tr> <Th> 157 </Th> <Td> </Td> <Td> `` Ghosts of the Past '' </Td> <Td> John Behring </Td> <Td> Kevin Riley </Td> <Td> October 6 , 2017 ( 2017 - 10 - 06 ) </Td> <Td> 803 </Td> <Td> 9.49 </Td> </Tr> <Tr> <Td colspan="8"> 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 ) . </Td> </Tr> <Tr> <Th> 158 </Th> <Td> </Td> <Td> `` The Enemy of My Enemy '' </Td> <Td> Robert Harmon </Td> <Td> Ian Biederman </Td> <Td> October 13 , 2017 ( 2017 - 10 - 13 ) </Td> <Td> 802 </Td> <Td> 8.98 </Td> </Tr> <Tr> <Td colspan="8"> Erin 's case against human trafficker Chao Lin ( Tia Carrere ) faces difficulty when the presiding judge falls off a roof to his death . Danny and Baez investigate , 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 ) . </Td> </Tr> <Tr> <Th> 159 </Th> <Td> </Td> <Td> `` Out of the Blue '' </Td> <Td> David M. Barrett </Td> <Td> Brian Burns </Td> <Td> October 20 , 2017 ( 2017 - 10 - 20 ) </Td> <Td> 804 </Td> <Td> 9.08 </Td> </Tr> <Tr> <Td colspan="8"> 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 . </Td> </Tr> <Tr> <Th> 160 </Th> <Td> 5 </Td> <Td> `` The Forgotten '' </Td> <Td> Ralph Hemecker </Td> <Td> Allie Solomon </Td> <Td> October 27 , 2017 ( 2017 - 10 - 27 ) </Td> <Td> 805 </Td> <Td> 8.29 </Td> </Tr> <Tr> <Td colspan="8"> Danny and Baez investigate the murder of a single mother whose ex-husband has a documented history of violence . Also , Frank deals with the fallout when Mayor Dutton eliminates solitary confinement in prisons , while Jamie 's effort to save a young woman who overdosed on heroin has unexpected consequences . </Td> </Tr> <Tr> <Th> 161 </Th> <Td> 6 </Td> <Td> `` Brushed Off '' </Td> <Td> Eric Laneuville </Td> <Td> Daniel Truly </Td> <Td> November 3 , 2017 ( 2017 - 11 - 03 ) </Td> <Td> 806 </Td> <Td> 9.27 </Td> </Tr> <Tr> <Td colspan="8"> When a famous basketball player is found dead of an apparent drug overdose , Danny and Maria look into his possible ties to a local drug gang . Also , Erin revisits the case of a man she may have wrongfully convicted nine years ago , and Frank is approached by Archbishop Kearns ( Stacey Keach ) regarding an eviction matter Jamie and Eddie are working on . </Td> </Tr> <Tr> <Th> 162 </Th> <Td> 7 </Td> <Td> `` Common Ground '' </Td> <Td> David M. Barrett </Td> <Td> Siobhan Byrne O'Connor </Td> <Td> November 10 , 2017 ( 2017 - 11 - 10 ) </Td> <Td> 807 </Td> <Td> 9.94 </Td> </Tr> <Tr> <Td colspan="8"> A case turns personal for Danny when he works to protect a nurse , Faith Madson ( Jessie Mueller ) , from her violent ex-boyfriend . Meanwhile , Shelly Wayne ( Cassandra
<Table> <Tr> <Th> No . overall </Th> <Th> No. in season </Th> <Th> Title </Th> <Th> Directed by </Th> <Th> Written by </Th> <Th> Original air date </Th> <Th> Prod . code </Th> <Th> U.S. viewers ( millions ) </Th> </Tr> <Tr> <Th> 156 </Th> <Td> </Td> <Td> `` Cutting Losses '' </Td> <Td> David M. Barrett </Td> <Td> Siobhan Byrne O'Connor </Td> <Td> September 29 , 2017 ( 2017 - 09 - 29 ) </Td> <Td> 801 </Td> <Td> 10.04 </Td> </Tr> <Tr> <Td colspan="8"> 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 ) who 's been attacked in his office . Jamie and Eddie go undercover as a couple to bust a shady drug dealer ; new mayor Margaret Dutton ( Lorraine Bracco ) butts heads with Frank . </Td> </Tr> <Tr> <Th> 157 </Th> <Td> </Td> <Td> `` Ghosts of the Past '' </Td> <Td> John Behring </Td> <Td> Kevin Riley </Td> <Td> October 6 , 2017 ( 2017 - 10 - 06 ) </Td> <Td> 803 </Td> <Td> 9.49 </Td> </Tr> <Tr> <Td colspan="8"> 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 ) . </Td> </Tr> <Tr> <Th> 158 </Th> <Td> </Td> <Td> `` The Enemy of My Enemy '' </Td> <Td> Robert Harmon </Td> <Td> Ian Biederman </Td> <Td> October 13 , 2017 ( 2017 - 10 - 13 ) </Td> <Td> 802 </Td> <Td> 8.98 </Td> </Tr> <Tr> <Td colspan="8"> Erin 's case against human trafficker Chao Lin ( Tia Carrere ) faces difficulty when the presiding judge falls off a roof to his death . Danny and Baez investigate , 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 ) . </Td> </Tr> <Tr> <Th> 159 </Th> <Td> </Td> <Td> `` Out of the Blue '' </Td> <Td> David M. Barrett </Td> <Td> Brian Burns </Td> <Td> October 20 , 2017 ( 2017 - 10 - 20 ) </Td> <Td> 804 </Td> <Td> 9.08 </Td> </Tr> <Tr> <Td colspan="8"> 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 . </Td> </Tr> <Tr> <Th> 160 </Th> <Td> 5 </Td> <Td> `` The Forgotten '' </Td> <Td> Ralph Hemecker </Td> <Td> Allie Solomon </Td> <Td> October 27 , 2017 ( 2017 - 10 - 27 ) </Td> <Td> 805 </Td> <Td> 8.29 </Td> </Tr> <Tr> <Td colspan="8"> Danny and Baez investigate the murder of a single mother whose ex-husband has a documented history of violence . Also , Frank deals with the fallout when Mayor Dutton eliminates solitary confinement in prisons , while Jamie 's effort to save a young woman who overdosed on heroin has unexpected consequences . </Td> </Tr> <Tr> <Th> 161 </Th> <Td> 6 </Td> <Td> `` Brushed Off '' </Td> <Td> Eric Laneuville </Td> <Td> Daniel Truly </Td> <Td> November 3 , 2017 ( 2017 - 11 - 03 ) </Td> <Td> 806 </Td> <Td> 9.27 </Td> </Tr> <Tr> <Td colspan="8"> When a famous basketball player is found dead of an apparent drug overdose , Danny and Maria look into his possible ties to a local drug gang . Also , Erin revisits the case of a man she may have wrongfully convicted nine years ago , and Frank is approached by Archbishop Kearns ( Stacey Keach ) regarding an eviction matter Jamie and Eddie are working on . </Td> </Tr> <Tr> <Th> 162 </Th> <Td> 7 </Td> <Td> `` Common Ground '' </Td> <Td> David M. Barrett </Td> <Td> Siobhan Byrne O'Connor </Td> <Td> November 10 , 2017 ( 2017 - 11 - 10 ) </Td> <Td> 807 </Td> <Td> 9.94 </Td> </Tr> <Tr> <Td colspan="8"> A case turns personal for Danny when he works to protect a nurse , Faith Madson ( Jessie Mueller ) , from her violent ex-boyfriend . Meanwhile , Shelly Wayne ( Cassandra
who is playing the new mayor on blue bloods
who is playing the new mayor on blue bloods
Lorraine Bracco
Lorraine Bracco