<P> Donnie Wahlberg (Danny Reagan), Bridget Moynahan (Erin Reagan), Will Estes (Jamie Reagan), and Len Cariou (Henry Reagan) are first credited . Sami Gayle (Nicky Reagan - Boyle) is 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 . </P> <P> 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 . </P> <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> US 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 (Stacy 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, Ray . Danny and Faith realize they have a lot in common and bond . Ray later arrives at the hospital Faith works at, shooting multiple workers and patients until threatening to kill her . Danny saves Faith, who later visits him at his precinct to invite him to dinner . Danny politely turns her down, saying he still feels like he's married . Meanwhile, Shelly Wayne (Cassandra Freeman), an acquaintance of Frank's, comes to him with a theory regarding the death of an inmate . Also, Jamie and Eddie help deliver a baby, only to learn that the mother and her family are undocumented immigrants living in deplorable conditions . Eddie manages to get the father a job working as a building superintendent, which comes with a suitable apartment of their own . </Td> </Tr> <Tr> <Th> 163 </Th> <Td> 8 </Td> <Td> "Pick Your Poison" </Td> <Td> Heather Cappiello </Td> <Td> Kevin Wade </Td> <Td> November 17, 2017 (2017 - 11 - 17) </Td> <Td> 808 </Td> <Td> 9.25 </Td> </Tr> <Tr> <Td_colspan="8"> Eddie makes a questionable arrest of a man revealed to be a college acquaintance who once humiliated her in a frat house . Frank learns one of his best lieutenants tested positive for marijuana after a trip to Colorado, and gets caught between department regulations and Mayor Dutton's stance on making pot legal . Meanwhile, Danny and Baez investigate a murder linked to a white supremacist group . </Td> </Tr> <Tr> <Th> 164 </Th> <Td> 9 </Td> <Td> "Pain Killers" </Td> <Td> John Behring </Td> <Td> Ian Biederman </Td> <Td> December 1, 2017 (2017 - 12 - 01) </Td> <Td> 809 </Td> <Td> 8.84 </Td> </Tr> <Tr> <Td_colspan="8"> As Danny and Baez join a narcotics task force to track down a drug supplier at a prep school, Baez comes into contact with fentanyl and is soon fighting for her life from an accidental overdose . Also, Jamie and Eddie work to protect a rehabilitated sex offender whose neighbors are angry he lives in their apartment building, and Frank forms an unlikely alliance with Mayor Dutton when Governor Mendez (David Zayas) refuses to involve the NYPD during a major state trooper initiative . </Td> </Tr> <Tr> <Th> 165 </Th> <Td> 10 </Td> <Td> "Heavy Is the Head" </Td> <Td> David M. Barrett </Td> <Td> Brian Burns </Td> <Td> December 8, 2017 (2017 - 12 - 08) </Td> <Td> 810 </Td> <Td> 9.40 </Td> </Tr> <Tr> <Td_colspan="8"> Erin is conflicted when Jamie and Eddie ask her to help drop old charges against a man, Parker Mack (Spencer House), who just bravely rescued a woman from a local hostage situation . Meanwhile, Danny and Baez work a case involving car thieves and discover the leader is Victor Lugo (Nick Cordero), a mobster they've dealt with before . Also, Baker receives a job offer which Frank learns may have strings attached . </Td> </Tr> <Tr> <Th> 166 </Th> <Td> 11 </Td> <Td> "Second Chances" </Td> <Td> Deran Sarafian </Td> <Td> Kevin Riley </Td> <Td> January 5, 2018 (2018 - 01 - 05) </Td> <Td> 811 </Td> <Td> 9.98 </Td> </Tr> <Tr> <Td_colspan="8"> When a journalist disappears while working on an exposé about an innocent man serving time for murder, Danny and Baez hope that reexamining the original case will help find her . Also, Frank reluctantly speaks out against an initiative led by Erin's office to consider drug abuse as a disease first, and a crime second . </Td> </Tr> <Tr> <Th> 167 </Th> <Td> 12 </Td> <Td> "The Brave" </Td> <Td> Thomas R. Moore </Td> <Td> Siobhan Byrne O'Connor </Td> <Td> January 12, 2018 (2018 - 01 - 12) </Td> <Td> 812 </Td> <Td> 10.17 </Td> </Tr> <Tr> <Td_colspan="8"> Anthony is shot while interviewing a witness for an upcoming murder trial . Despite their differences, Danny takes up the case to find out who was responsible, telling Erin that Anthony is still "one of us". Also, Jamie and Eddie get in the middle of a standoff between a police captain and a developmentally disabled man posing as an officer, and Nicky prepares to take the police exam over her mom's objections . </Td> </Tr> <Tr> <Th> 168 </Th> <Td> 13 </Td> <Td> "Erasing History" </Td> <Td> Jane Raab </Td> <Td> Daniel Truly </Td> <Td> January 19, 2018 (2018 - 01 - 19) </Td> <Td> 813 </Td> <Td> 9.45 </Td> </Tr> <Tr> <Td_colspan="8"> When Henry is the key witness on Danny and Baez's case, his meddling pushes Danny's buttons until he leads them to valuable information . Also, Nicky shocks her family by siding with her activist friend, Christie (Naian Gonzalez Norvind), who defaced the NYPD flag with red paint at One Police Plaza, and Jamie and Eddie learn a parole officer is taking advantage of his power over parolees . </Td> </Tr> <Tr> <Th> 169 </Th> <Td> 14 </Td> <Td> "School of Hard Knocks" </Td> <Td> Alex Zakrzewski </Td> <Td> Ian Biederman </Td> <Td> February 2, 2018 (2018 - 02 - 02) </Td> <Td> 814 </Td> <Td> 9.32 </Td> </Tr> <Tr> <Td_colspan="8"> When a student is shot by a rival gang member in his high school courtyard, Danny and Baez try to get a grasp on the situation to prevent a reoccurrence, but the principal, Darryl Ward (Ernie Hudson), recklessly takes matters into his own hands . Also, Erin tries to help her friend, Mickey (Raphael Sbarge), who is mixed up in an illegal gambling ring, and Governor Mendez tries to frame Frank after one of his top legislative aides is shot by an NYPD officer . </Td> </Tr> <Tr> <Th> 170 </Th> <Td> 15 </Td> <Td> "Legacy" </Td> <Td> David M. Barrett </Td> <Td> Allie Solomon </Td> <Td> March 2, 2018 (2018 - 03 - 02) </Td> <Td> 815 </Td> <Td> 9.06 </Td> </Tr> <Tr> <Td_colspan="8"> Danny thinks about taking a new, higher - paying job to help with his family's financial issues . At the same time, he and Maria work a case of a recently divorced man who was poisoned . Nicky is sexually harassed by her boss while working at her new internship . Frank has to deal with the fallout after a rookie cop is caught on video questioning the immigration status of a pedestrian . </Td> </Tr> <Tr> <Th> 171 </Th> <Td> 16 </Td> <Td> "Tale of Two Cities" </Td> <Td> Robert Duncan McNeill </Td> <Td> Brian Burns </Td> <Td> March 9, 2018 (2018 - 03 - 09) </Td> <Td> 816 </Td> <Td> 8.95 </Td> </Tr> <Tr> <Td_colspan="8"> Danny and Baez investigate the murder of a man who was living a double life with two separate families, and Anthony tries to resist when Erin asks him to help investigate his old partner, whom she suspects of stealing drug money . Also, Frank deliberates between two candidates for the chief of transit position . </Td> </Tr> <Tr> <Th> 172 </Th> <Td> 17 </Td> <Td> "Close Calls" </Td> <Td> Jane Raab </Td> <Td> Peter Blauner </Td> <Td> March 30, 2018 (2018 - 03 - 30) </Td> <Td> 817 </Td> <Td> 8.43 </Td> </Tr> <Tr> <Td_colspan="8"> After Danny's brother - in - law, Jimmy (Kevin Dillon), gets caught up with the mob and steals Danny's credit card, Danny forces Jimmy to take down the mobsters with Baez's help . Meanwhile, Frank has Erin and Anthony investigate if his old partner, Lenny (Treat Williams), is truly guilty of a crime . Also, Jamie is approached by Tariq (Rene Ifrah), an officer he met at the academy almost ten years ago, who wants his help getting released from his undercover assignment at a mosque . </Td> </Tr> <Tr> <Th> 173 </Th> <Td> 18 </Td> <Td> "Friendship, Love, and Loyalty" </Td> <Td> Robert Harmon </Td> <Td> Siobhan Byrne O'Connor </Td> <Td> April 6, 2018 (2018 - 04 - 06) </Td> <Td> 818 </Td> <Td> 8.75 </Td> </Tr> <Tr> <Td_colspan="8"> After a woman voices her outrage regarding the NYPD's inability to find her son's murderer, Danny reexamines the case, upsetting the original detective, Erin, and Anthony, who didn't pursue the case due to lack of evidence . Elsewhere, Eddie is shot while she and Jamie respond to a domestic dispute call, but her vest saves her; another officer is killed in the exchange of gunfire . The incident leaves Jamie pondering his feelings for Eddie, and Erin once again tries to convince him to act on them . However, he decides against it due to Eddie having a new boyfriend, although this leaves him saddened . Erin and her ex-husband, Jack, face off when the latter defends the shooter . Frank contends with an angry police force when Mayor Dutton suggests at a press conference that the shooter may have felt threatened by the police . Mayor Dutton later reveals to Frank that she won't seek reelection, instead wanting to pursue activism . </Td> </Tr> <Tr> <Th> 174 </Th> <Td> 19 </Td> <Td> "Risk Management" </Td> <Td> David M. Barrett </Td> <Td> Ian Biederman </Td> <Td> April 13, 2018 (2018 - 04 - 13) </Td> <Td> 819 </Td> <Td> 8.25 </Td> </Tr> <Tr> <Td_colspan="8"> Danny and Baez race to find a missing girl who will die within 72 hours without her heart medication . Interrogating the parents, Danny learns they were forced to turn to a loan shark for financial assistance after the girl's heart transplant surgery, and the loan shark ordered the kidnapping after the parents didn't pay him back quick enough . Also, Jamie and Eddie are on the wrong side of an investigation after engaging in a car chase . The carjacker had a child seat in the back of the car which is revealed to be unoccupied, and the boss suspends Jamie and Eddie for 30 days . Jamie represents himself and Eddie in the hearing, arguing that police officers are trained to make split - second decisions, which can sometimes end badly . Ultimately, Jamie and Eddie are cleared to return to duty . Frank, Garrett and Gormley investigate the rise in the settlement of lawsuits against cops, and Kelly Peterson (Bebe Neuwirth) returns to debate the topic with Frank . Meanwhile, Sean wins an essay contest and receives a medal from former New York City Mayor David Dinkins . Sean is reluctant to go to the ceremony, because he still misses his mother dearly, but relents after Danny tells him it's what Linda would've wanted him to do . </Td> </Tr> <Tr> <Th> 175 </Th> <Td> 20 </Td> <Td> "Your Six" </Td> <Td> Ralph Hemecker </Td> <Td> Brian Burns </Td> <Td> April 27, 2018 (2018 - 04 - 27) </Td> <Td> 820 </Td> <Td> 8.13 </Td> </Tr> <Tr> <Td_colspan="8"> When Danny resorts to asking his incarcerated archenemy, Victor Lugo (Nick Cordero), for help locating a dangerous criminal who escaped from prison, Lugo refuses to assist unless he's allowed to accompany them on the pursuit . As Danny pursues the suspect into an old building, Lugo somehow deduces that it was a trap, and he is able to get Danny and the other cops out of the building before it explodes . Meanwhile, Frank subtly tries to convince Jamie to take the sergeant's test, but Jamie gives the application to Eddie instead . After being confronted by Frank, Jamie adamantly says he wants to stay on patrol . That evening, Jamie arrives late to Sunday dinner due to helping Eddie study . Also, Erin's plan to go on a date with her ex-husband causes friction between her and Anthony . Anthony had a fender bender that Jack was accidentally responsible for, due to making out with his new girlfriend, and Anthony confronts Jack in his office, stating that Erin deserves someone who will treat her like a queen . </Td> </Tr> <Tr> <Th> 176 </Th> <Td> 21 </Td> <Td> "The Devil You Know" </Td> <Td> John Behring </Td> <Td> Peter Blauner </Td> <Td> May 4, 2018 (2018 - 05 - 04) </Td> <Td> 821 </Td> <Td> 7.78 </Td> </Tr> <Tr> <Td_colspan="8"> Frank goes head - to - head with a data - tracking company when they refuse to unlock the phone of a terrorist that may hold information regarding upcoming targets . He and Kelly Peterson meet with the CEO of the company, who personally refuses due to the public's views on phone privacy . Kelly reluctantly grants Frank's request to talk to the CEO again, and, in a private meeting, he finally gives Frank the information he needs . Elsewhere, when Erin obtains information about an impending murder from a known crime boss (John Pankow), she gets Danny and Baez involved, despite the questionable agenda of the informant . The criminal uses his son's release from jail as leverage, but it's revealed that the criminal orchestrated the hit himself . Also, Jamie and Eddie try to locate a woman, Alice, who kidnapped a newborn baby . Alice suffered a miscarriage, then posed as a nurse to kidnap the baby . Jamie has Eddie try to talk Alice down while he acts as the safety net below the bridge Alice is standing on with the baby, and Eddie saves the baby, later returning him to his parents . </Td> </Tr> <Tr> <Th> 177 </Th> <Td> 22 </Td> <Td> "My Aim is True" </Td> <Td> David M. Barrett </Td> <Td> Kevin Wade </Td> <Td> May 11, 2018 (2018 - 05 - 11) </Td> <Td> 822 </Td> <Td> 8.88 </Td> </Tr> <Tr> <Td_colspan="8"> When a series of drive - by murders occur after six wrongly convicted men (called the "Prospect Park Six," loosely inspired by the Central Park Five) are released from prison, Danny and Baez wonder if they were orchestrated by one or more of the men as an act of revenge . Meanwhile, Frank combats the guilt he feels about these innocent men unfairly serving nine years in prison . One of the Prospect Park Six, Duwann Wilson, is revealed to have hired a hitman, Dante Sorrento, to kill various family members of the arresting officers and prosecutors responsible for locking them up nine years ago (one of which is Erin's boss), as his mother had died while he was in prison and he wasn't allowed to attend her funeral . Elsewhere, Jamie and Eddie arrest the younger brother of one of the Prospect Park Six after he crashes a stolen car . Despite the mother wanting the cops to just leave the family alone, the older brother secretly meets with Jamie and Eddie to give them information about Wilson, who is hiding in Miami; Danny has Miami officers pose as massage therapists at the hotel Wilson is staying at, and they successfully arrest him . Sorrento, still at large, follows Jamie and Eddie as they begin a shift, targeting the former . When Eddie stops for coffee, she senses Jamie is in peril and kills Sorrento, saving Jamie's life . This affects their personal relationship; at Sunday dinner, Jamie reveals he looked at the patrol guide and didn't find any rules against married cops being partners on the force and brings Eddie, now his fiancée, to officially meet the family . </Td> </Tr> </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> US viewers (millions) </Th> </Tr>

Who plays the mayor in blue bloods 2018