CBS gives fans first look at Blue Bloods star's Boston Blue replacement

CBS has dropped the first photos from Boston Blue season 1 which include a series of photos that give fans a first-look at one Blue Bloods star's replacement.
“Family Matters” – Blue Bloods. Pictured: Donnie Wahlberg as Danny Reagan and Andrew Terraciano as Sean Reagan. Photo: CBS ©2023 CBS Broadcasting, Inc. All Rights Reserved. Highest quality screengrab available.
“Family Matters” – Blue Bloods. Pictured: Donnie Wahlberg as Danny Reagan and Andrew Terraciano as Sean Reagan. Photo: CBS ©2023 CBS Broadcasting, Inc. All Rights Reserved. Highest quality screengrab available.

Over the course of Blue Bloods’ fourteen-season run, CBS’s Friday night drama managed to achieve a feat few shows are able to attain during their runs: keeping around the majority of its original cast. While there were a few exits over the years, most notably with the departures of Jennifer Esposito and Amy Carlson, the show managed to find a way to keep the rest of the show’s core ensemble around right up to the end. 

Perhaps that’s why it was so shocking when CBS announced the recasting of Danny’s youngest son, Sean Reagan, for the forthcoming spinoff, Boston Blue. 

Rather than bringing Andrew Terraciano back to reprise the role he originated in the Blue Bloods series premiere and portrayed over the course of all 14 seasons of the show, CBS chose to bring in Mika Amonsen to play an aged-up version of Sean. The news left fans with a lot of questions, and Amonsen is going to have to prove himself to fans, but the first photos from the premiere of Boston Blue certainly have us excited to meet this new version of Sean!

Pilot
"Pilot" - Boston Blue. Pictured (L-R): Marcus Scribner as Jonah Silver and Mika Amonsen as Sean Reagan | Photo: Michele Crowe/CBS ©2025 CBS Broadcasting, Inc. All Rights Reserved.

In the first photos from the series premiere of Boston Blue, we get our first glimpse of Amonsen as Sean Reagan, and we have a strong feeling he’s going to be partnering up with the youngest member of the Silver family. We say this because nearly all of the premiere photos find Sean alongside Jonah Silver (Marcus Scribner), a fellow rookie in the Boston PD. 

The first of the photos features Sean and Jonah outside, presumably after duty, seemingly enjoying a night out on the town. Our guess is that the moment will come toward the end of the episode as the pair celebrate breaking a case and surviving what seems to be a brush with death. 

Said brush with death seems to be hinted at via a quartet of photos in which we see the pair trapped in a building fire. Given the context of the photos, it seems likely that the pair were following a lead when a fire breaks out, leaving them to think fast in order to make it out alive.

Pilot
"Pilot" - Boston Blue. Pictured (L-R): Marcus Scribner as Jonah Silver and Mika Amonsen as Sean Reagan | Photo: John Medland/CBS ©2025 CBS Broadcasting, Inc. All Rights Reserved
Pilot
"Pilot" - Boston Blue. Pictured (L-R): Mika Amonsen as Sean Reagan and Marcus Scribner as Jonah Silver | Photo: John Medland/CBS ©2025 CBS Broadcasting, Inc. All Rights Reserved.
Pilot
"Pilot" - Boston Blue. Pictured: Mika Amonsen as Sean Reagan | Photo: John Medland/CBS ©2025 CBS Broadcasting, Inc. All Rights Reserved.
Pilot
"Pilot" - Boston Blue. Pictured (L-R): Marcus Scribner as Jonah Silver and Mika Amonsen as Sean Reagan | Photo: John Medland/CBS ©2025 CBS Broadcasting, Inc. All Rights Reserved.

Could it be that the young cops get a little too close to catching a suspect in the case, who tries to cover up their crime and dispose of the two officers in the process? Given that the premiere will find Danny teaming up with Boston detective Lena Silver to investigate a deadly fire at a tech company, that’s definitely a possibility. We could see Sean and Jonah chasing a lead in hopes of impressing their respective relatives, and ending up in over their heads. A near-death experience for Sean could also explain why Danny chooses to stick around in Boston to keep a close eye on his son. 

We’ll find out what the context behind the photos truly is and what the episode holds for the pair when Boston Blue premieres on Oct. 17 at 10/9c on CBS! 

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