Jay Hernandez stars as Thomas Magnum in a modern take on the classic series about a decorated former Navy SEAL who, upon returning home from Afghanistan, repurposes his military skills to become a private investigator in Hawaii, on the series premiere of MAGNUM P.I., Monday, Sept. 24 (9:00-10:00 PM, ET/PT) on the CBS Television Network. Karen Neal/CBS ©2018 CBS Broadcasting, Inc. All Rights Reserved