CBS picked up six pilots for the 2018-2019 season, including reboots of “Cagney and Lacey” and “Magnum P.I.” “Magnum P.I.” is described as an updated version of the original series that follows Thomas Magnum, a decorated ex-Navy SEAL who, upon returning home to Hawaii from Afghanistan, repurposes his military skills to become a private investigator. Tom Selleck played the mustachioed Magnum in the original series. Peter Lenkov, the writer and producer behind current CBS reboots of “Hawaii Five-O” and “MacGyver,” will serve as the writer and executive producer on the new version of the classic 1980s series, which had previously...