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

It's unknown if there will be other recastings or reprisals down the line as Boston Blue continues, but fans do have 14 ...

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

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

CBS premiered its latest police drama, Boston Blue, on October 17, 2025. The Reagan family was introduced to the new city and ...

"Boston Blue" showrunners open up about the surprise "Blue Bloods" cameo in the premiere and recasting Sean for the spinoff.

Turns out, that figuring-out process will happen on screen. Brandon Sonnier and Brandon Margolis, the co-creators of the Blue ...

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

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

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

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

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