Donnie Wahlberg has revealed three major guest stars coming toBoston Blue, including aBlue Bloods alum from the Reagan family, when Season 1 returns in February. Len Cariouwill reprise his role as Henry Reagan whenBoston Bluereturns with the second half of Season 1. Holly Robinson Peete and Boston Celtics star Jaylen Brown will also guest star. TV Insider has learned when Cariou will appear onBoston Blue, plus the first character details about Peete and Brown’s roles.
Wahlberg revealed Cariou, Peete, and Brown’s appearances during a Television Critics Association panel on Tuesday, January 27. Cariou will guest star in Boston BlueSeason 1 Episode 13, which airs in April, CBS tells TV Insider. Peete will play Jill, Mae Silver’s (Gloria Reuben) sister, who comes to visit. Brown will make a cameo as himself at the Boston Police Department office. Peete and Brown will make their Boston Blue debuts this spring.
“Grandpa Reagan’s going to be showing up, and Erin [Reagan-Boyle, played by Bridget Moynahan] is going to show up again,” Wahlberg told TCA. “We have other people too, like Jaylen Brown and Holly Robinson Peete, and a bunch of people coming.”
These cameos came after Wahlberg shared a spoiler-free update on what to expect from Danny Reagan and Maria Baez’s (Marisa Ramirez) long-distance relationship.
“They’re figuring things out,” Wahlberg said of Danny and Baez. “I’m not going to reveal too much to you right now. I will just tell you that it’s not resolved. And she will be back in the coming episodes.”
Ramirez and Moynahan were the firstBlue Bloods cameos inBoston Blue. They each appeared in the series premiere, and Ramirez returned later. There are more Reagans ahead this season, both old and new. Series co-creator Brandon Margolis previously told TV Insider that “there are new characters that will show up. We will meet more members of the Silver family, and we will see members of the Reagan family we have not yet seen.”
Wahlberg previously shared a video of Brown on set with him and costar Sonequa Martin-Green, but it wasn’t known at the time if the basketball player was filming a guest-star spot or just visiting the set of the Boston-set series (which films primarily in Toronto, Canada, and only sometimes in its titular city due to budget constraints).
In addition to never-before-seen Reagans to come inBoston BlueSeason 1, viewers will be meeting more members of the Silver family, such as Jill. Peete and Reuben previously worked together on21 Jump Street in the 1980s.
— Additional reporting by Meredith Jacobs
Boston Blue, Midseason Return, Friday, February 27, 2026, 10/9c, CBS