Even though CBS' "Blue Bloods" mostly centers on the criminal justice system, fans know the heart of the series is actually the Reagan family. Just about every episode features one of its famous Sunday family dinners, regularly attended by the oldest and youngest Reagan family members.

The head and the foot of the dinner table are occupied by the patriarchs of the Reagan family, Henry (Len Cariou), and his son Frank (Tom Selleck), while the rest of the table is filled by their respective children and grandchildren. Remarkably, most of the cast from the pilot episode still appear on the show, 12 seasons later.

So, which members of the cast have never missed a Sunday family dinner? According to IMDb, the only five actors who have appeared in every episode are: Tom Selleck, Donnie Wahlberg, Bridget Moynahan, Len Cariou, and Will Estes, appearing in a total of 247 episodes.