Andrew Terraciano was replaced by Mika Amonsen—co-showrunner Brandon Margolis says it boils down to evolving character plots.

One big difference between Blue Bloods and Boston Blue is that Sean has been recast. Here's why a new actor stepped in for ...

It becomes clear by Boston Blue Episode 2 that Danny Reagan is actually the weakest link in the Blue Bloods spin-off.

Mika Amonsen is a Canadian actor of Thanksgiving fame who replaced Andrew Terraciano as Sean Reagan on Boston Blue Season 1 ...

Boston Blue' co-showrunner Brandon Margolis weighed in on why Mika Amonsen replaced Andrew Terraciano as Sean Reagan.

TV Insider has reported that Mika Amonsen will take over the role of "Danny Reagan’s (Donnie Wahlberg) youngest son, Sean ...

One of BOSTON BLUE’s creators is opening up about the decision to recast Sean Reagan in the BLUE BLOODS spin-off.

Brandon Sonnier and Brandon Margolis, known as “The Brandons,” co-created Boston Blue. They explained their decision to recast Sean to TV Insider.

Andrew Terraciano played Danny Reagan's son throughout the 14-year run of 'Blue Bloods,' while Mika Amonsen takes over in the ...

Marisa Ramirez 's Det. Maria Baez made a surprise appearance in the Boston Blue premiere, but it isn't the last fans will be ...

(L-R): Ernie Hudson as Reverend Peters, Sonequa Martin-Green as Lena Silver, Donnie Wahlberg as Danny Reagan, and Mika Amonsen as Sean Reagan in ‘Boston Blue’ | Christos Kalohoridis/CBS ©2025 CBS ...