Blue Bloods focuses on a family devoted to serving law enforcement in New York City. As in any demanding role, New York City Police Commissioner Frank Reagan (Tom Selleck) struggles to identify the right thing to do.

Selleck, of course, is an accomplished actor on stage and screen, with countless hit shows and movies behind him. The now-77-year-old once revealed what he considers one of the most significant faults of his Blue Bloods character.

Tom Selleck plays New York Police Commissioner Frank Reagan Tom Selleck as Frank Reagan in Blue Bloods | John Paul Filo/CBS via Getty Images

Before Blue Bloods, Selleck’s most high-profile TV role was the title character on Magnum, P.I. But the actor has also played popular roles on Friends, The Closer, Las Vegas, and the Jesse Stone series of TV movies. Meanwhile, his movie roles include Three Men and a Baby, Quigley Down Under,