The moment Boston Blue was greenlit, fans hoped Blue Bloods stars would be crossing over and reuniting with Donnie Wahlberg’s Danny Reagan — but he played coy about how the other Reagans would be featured.
“Now, it’s just Danny going to this new world, but I can’t say a lot about it — but I could say, if he’s a Reagan, it will never be just Danny,” Wahlberg told Fox News Digital in June 2025. “There’ll always be a Reagan a phone call away.”
Blue Bloods ran for 14 seasons on CBS, ending in December 2024. The series followed NYPD Commissioner Frank Reagan (Tom Selleck), and his children, Detective Danny (Wahlberg), ADA Erin (Bridget Moynahan) and officer Jamie (Will Estes), as they navigated family and their jobs in New York City. The series also starred Len Cariou as Frank’s father, former commissioner Henry Reagan, and Franks’ three grandchildren.
Boston Blue, which premiered in October 2025, is focused on Danny as he leaves New York for Boston after his youngest son, Sean (Mika Amonsen), gets injured in a fire. Sean is living in Boston as a police officer after a hiring freeze in New York left him unable to follow in the Reagan family footsteps in the Big Apple.
While Danny is away from the majority of his family, they aren’t far from his mind — or unable to make a cameo on the spinoff.
Scroll down to see which Blue Bloods stars have appeared on Boston Blue so far:
Marisa Ramirez
Ramirez reprised her role as Maria Baez during the season premiere in October 2025, but it wasn’t just as Danny’s longtime NYPD partner. After Danny asked Baez out for pizza — to take the next step in their romantic relationship — during the Blue Bloods finale, fans finally learned their fate.
“I thought we said when we stay at my place, we turn our ringers off,” Danny told Baez during the premiere as he entered his bedroom shirtless and Baez sat on his bed wearing an oversized shirt with her bra peeking out.
She quipped, “It’s your phone, smart ass,” before handing her boyfriend his cell. The sexy moment confirmed that Baez and Danny are an item. However, the call informed Danny that Sean was in the hospital in Boston so he left immediately to be by his side.
During season 1, Baez visited Danny in Boston and then pair decided to press pause on their relationship as she sorted out her life in New York. By season 2, Baez, her daughter and her mother moved to Boston to be closer to Danny and they continued to nurture their relationship.
Bridget Moynahan
After learning that Sean was hurt in a fire and hadn’t woken up at the hospital yet, Moynahan’s Erin Reagan arrived in Boston to be by her brother’s side.
“I’m pretty sure I said nobody needed to come,” Danny told Erin during the October 2025 premiere as she put flowers by Sean’s hospital bed. “Since when have I ever listened to you?” Erin replied.
Danny later asked how long his big sister would be in town, to which she said, “I’m here until I know you’re OK.”
Erin kept her word and joined Danny when he attended a Silver family dinner after working alongside Detective Lena Silver (Sonequa Martin-Green) in solving who started the fire that injured Sean.
The episode ended with Erin and Danny having their traditional Reagan Sunday dinner at the hospital before Sean opened his eyes.
Len Cariou
Wahlberg confirmed at a Television Critics Association panel in January 2026 that Len Cariou will reprise the role of grandpa Henry Reagan in an episode of Boston Blue in season 1. Cariou made his debut that April when Henry went to Boston to see his great-grandson Sean in uniform for the first time. Henry also caught up with his old BPD friends and shared wisdom with both Danny and Sean.
Cariou returned during the season 2 premiere in October 2026.
Will Estes
Estes reprised his role as Danny’s younger brother, Jamie Reagan, during a season 2 episode. In the November 2026 episode, Jamie arrived in Boston for a conference after making lieutenant back in New York.
Upon his arrival, Jamie and Danny butted heads as they always did on Blue Bloods, but they put aside their issues to work a joint case involving two brothers trying to avenge their sister’s death by seeking revenge.
After stopping an attack on a bar together, Jamie confessed that he was mad at Danny for leaving New York right when he became a dad and really needed him. Danny apologized and told him how proud he was of his baby brother. The pair ended the episode around the Silver dinner table for their weekly family sitdown.
Boston Blue airs on CBS Fridays at 10 p.m. ET.
