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., 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.\nSelleck has appeared in more than fifty film and television roles since Magnum, P.I., including Three Men and a Baby, Quigley Down Under, Mr. Baseball, and Lassiter. Selleck appeared as Dr. Richard Burke on Friends, where he played the on-again, off-again love-interest of Monica Geller, and as A.J. Cooper on the TV series Las Vegas.