Len Cariou Returns as Henry Reagan in Powerful 'Boston Blue' Episode

Pop Reagan visits Boston to see his great-grandson Sean in uniform and deliver a special gift to Danny.

Apr. 1, 2026 at 8:12pm

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Len Cariou reprises his role as Henry Reagan, the beloved patriarch of the Reagan family, in an emotional episode of the Blue Bloods spinoff series Boston Blue. Henry travels to Boston to visit his great-grandson Sean, who is now a rookie cop, and to deliver a special gift to his grandson Danny. The episode features heartfelt family reunions, a drive-by shooting at a church, and revelations about the past of Reverend Edwin Peters and his daughters.

Why it matters

The appearance of Henry Reagan, played by veteran actor Len Cariou, marks the first major Reagan family cameo on the new Boston Blue series. Henry's visit highlights the strong family bonds and dynamics that were a central part of the original Blue Bloods show, and his interactions with Danny and Sean are expected to be both meaningful and impactful for longtime fans.

The details

In the episode, Henry Reagan travels from New York City to Boston to see his great-grandson Sean in uniform for the first time. Henry also has a special gift to deliver to his grandson Danny, who has moved to Boston to lead the new spinoff series. Alongside the family reunions, the episode features a drive-by shooting at a church that pulls Lena and Danny into the complicated past of one of Reverend Edwin Peters' associates. The episode also includes revelations about the family secrets of Reverend Peters' daughters, Mae and Jill.

  • Henry Reagan travels from New York City to Boston to visit his family.
  • Henry sees his great-grandson Sean in uniform for the first time.
  • Henry delivers a special gift to his grandson Danny.

The players

Len Cariou

An acclaimed actor who reprises his role as Henry Reagan, the patriarch of the Reagan family, in the Blue Bloods spinoff series Boston Blue.

Donnie Wahlberg

The actor who plays Danny Reagan, Henry's grandson, in the Boston Blue spinoff series.

Mika Amonsen

The actor who plays Sean Reagan, Henry's great-grandson, in the Boston Blue spinoff series.

Ernie Hudson

The actor who plays Reverend Edwin Peters, a character whose past is explored in the episode.

Gloria Reuben

The actress who plays Mae, one of Reverend Peters' daughters, and has a significant role in the episode.

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What they’re saying

“There was a very special relationship between Danny and Gramps on Blue Bloods. He was always sort of the go-to for advice. Yes, there was Frank, but it always felt like father and son had a little bit of friction, and in order to smooth that friction over, it was grandpa that Danny would go to.”

— Brandon Sonnier, Executive Producer

“Aside from the characters on the show having a special relationship, Len and Donnie have a special relationship.”

— Brandon Margolis, Executive Producer

What’s next

Fans can look forward to seeing Henry Reagan join the Silvers family for their weekly Shabbat dinner, where he will have a 'lovely moment' with Reverend Edwin Peters, played by Ernie Hudson.

The takeaway

The return of Len Cariou as Henry Reagan in the Boston Blue spinoff series is a significant event for longtime Blue Bloods fans, as it marks the first major appearance of a Reagan family member on the new show. The episode promises to deliver emotional family reunions, action-packed drama, and a deeper exploration of the relationships and dynamics that made the original series so beloved.