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

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

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

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

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

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 ...

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

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

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

Tom Selleck's Frank Reagan vouches for his son, Danny, to Sarah Silver in an important off-screen phone call in Boston Blue's ...

While many settled in to watch the first game of the World Series between the Toronto Blue Jays and the Los Angeles Dodgers, ...