The Blue Bloods universe finally entered a new era this week with the premiere of the highly-anticipated spin-off Boston Blue. Boston Blue, starring Donnie Wahlberg as Danny Reagan once again, premiered on CBS October 17, and introduced Blue Bloods fans to a new family prominent in law enforcement, this time the Silvers, who are based in Boston, rather than in New York City like the Reagans. And though in addition to Danny Reagan, the spin-off does bring over the Sean Reagan (Danny's son) character over to Boston, original star Andrew Terraciano was replaced by Mika Amonsen.

Show creators Brandon Sonnier and Brandon Margolis , speaking with TVLine about their decision to recast Andrew, who joined the series in 2010 and played Sean for 292 episodes, said: "We wanted a slig

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