When does Magnum, P.I. return?

The series ran from December 11, 1980, to May 1, 1988, during its first-run broadcast on CBS. Tom Selleck played Thomas Magnum, a private investigator (P.I.) living on Oahu, Hawaii. A remake series of the same name was ordered to series on May 11, 2018, and premiered on September 24, 2018.
Thomas Sullivan Magnum IV is a private investigator played by Tom Selleck. He lives in the guesthouse of a 200-acre (81 ha) beachfront estate called Robin's Nest, in Hawaii, at the invitation of its owner, Robin Masters. Masters is rarely depicted and is the celebrated author of several dozen lurid novels. Magnum lives a luxurious life on the estate and operates as a P.I. on cases that suit him. The only thorn in the side of his near-perfect lifestyle is Jonathan Quayle Higgins III, played by John Hillerman.