Thomas William "Tom" Selleck is an American actor and film producer. He is best known for his starring role as the private investigator Thomas Magnum in the television series Magnum, P.I. (1980 - 1988), based in Hawaii. He also plays Police Chief Jesse Stone in a series of made-for-TV movies based on Robert B. Parker novels. Since 2010, he has appeared as NYPD Commissioner Frank Reagan in the drama Blue Bloods on CBS.