Searxng/Boston Blue TV show tv Celebrity Beloved Blue Bloods patriarch Henry Reagan makes a special cameo in the Boston spinoff. See Len Cariou return to the iconic role. April 20, 2026 AceShowbiz - Boston Blue is set to deliver an exciting reunion for fans as a beloved veteran from the original Blue Bloods series prepares to make a special appearance. The CBS spinoff, which debuted in the 2025-2026 TV season, follows the father and son duo Danny and Sean Reagan as they adjust to their new lives in Boston.