Major spoilers ahead for the series premiere of Boston Blue , which is streaming now with a Paramount+ subscription .

Boston Blue has finally premiered on the 2025 TV schedule , and fans were reunited with Donnie Wahlberg ’s Detective Danny Reagan on Friday night. Although the series sees Danny in Boston, there have been teases that familiar faces will be showing up too. It was previously confirmed that Bridget Moynahan would be back as Erin Reagan for the series premiere, and people were delighted to see her comforting her brother after Sean ended up in the hospital. But that wasn’t the only cameo, and fans were even more delighted after another big surprise.

After Mika Amonsen’s Sean got hurt during a fire, Danny got the call about what happened, and he wasn’t alone

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