Blue Bloods vet Len Cariou guest-stars on Boston Blue - but the true reason for Henry Reagan's visit isn't revealed until the episode's final moments.
Boston Blue Welcomes Blue Bloods' Len Cariou In Season 1, Episode 13 - What Brings Grandpa Reagan To Beantown?
TVLine - 4 Apr 2026 02:59
Blue Bloods vet Len Cariou guest-stars on Boston Blue - but the true reason for Henry Reagan's visit isn't revealed until the episode's final moments.
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