[Warning: The following contains MAJOR spoilers for the Boston Blue series premiere, “Faith and Family.”]

Blue Bloods fans were given a shocking development when CBS announced that Sean Reagan was being recast in the Boston Blue spinoff earlier this year. Andrew Terraciano played Sean in Blue Bloods, and then Mika Amonsen made his debut as Sean in the Boston Blue series premiere on Friday, October 17. Now that the episode is out, the show’s creators are opening up about this casting changeup.

In Boston Blue, Donnie Wahlberg reprises his role as NYPD Detective Danny Reagan, who takes a position with the Boston Police Department and is paired with Detective Lena Silver ( Sonequa Martin-Green ), the eldest daughter of a prominent law enforcement family. The Silver family is

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