The Blue Bloods universe is officially expanding — and it’s kicking off with a familiar face. Actress Bridget Moynahan, who portrayed Assistant District Attorney Erin Reagan on the long-running CBS drama, is set to guest star in the series premiere of Boston Blue, the highly anticipated spinoff set to debut later this year.
Moynahan’s appearance marks a symbolic passing of the torch as Boston Blue introduces a new cast of characters and a fresh setting, while still honoring the legacy of Blue Bloods, which has become a staple of police dramas since its debut in 2010.
“It’s an honor to return to a world that means so much to me and the fans,” Moynahan said in a statement. “Erin Reagan has been such a defining part of my career, and getting to bring her into this new chapter, even briefly, feels like a full-circle moment.”
What We Know About Boston Blue
Unlike Blue Bloods, which focused on a multigenerational New York family deeply embedded in law enforcement, Boston Blue shifts the focus to a group of up-and-coming officers and prosecutors navigating the unique challenges of policing and justice in Boston.
While the full plot is still under wraps, CBS has confirmed that Boston Blue will maintain the same procedural-meets-family-drama tone that made Blue Bloods a hit — with a slightly younger, more dynamic cast and a contemporary lens on law enforcement.
Moynahan’s character, Erin Reagan, is expected to appear as a visiting prosecutor or mentor figure in the pilot, though producers have hinted her appearance could pave the way for more crossovers in the future.
“Bridget’s presence in the premiere not only connects the old and new worlds, but also reminds viewers that this universe is still very much alive,” said Boston Blue executive producer David Barrett. “Fans of Blue Bloods will feel right at home.”
A Universe in Expansion
CBS has been exploring ways to expand the Blue Bloods franchise as the original series nears its final season. With a loyal fan base and strong ratings over the years, the spinoff comes at the perfect time — offering both continuity and a bold new direction.
As Boston Blue prepares for its premiere, fans are already buzzing with anticipation on social media, especially with the news of Moynahan’s return.
The pilot episode is slated to air this fall, with an exact date expected to be announced soon. For now, fans can look forward to seeing a beloved Reagan step back into the courtroom — and possibly shape the future of this new chapter in the franchise.
