Legendary stage actor Len Cariou starred on Blue Bloods as former police commissioner and Reagan family patriarch Henry “Pop” ...

Ever since the Blue Bloods spin-off, Boston Blue, was announced, fans have been wondering if any of the original cast members will appear in the new show, apart from the lead, Donnie Wahlberg.

Wahlberg explained that everyone involved in "Blue Bloods" — from the cast and crew to the caterers and the props department — was very important to him. "They became part of our family.

Jillie Mack and Tom Selleck; Jenny McCarthy and Donnie Wahlberg.