The time has come for McGarrett and Magnum to say aloha to each other. TVLine has learned that a full-on crossover between CBS' Hawaii Five-0 and Magnum P.I. is officially happening, on Friday, Jan. 3, 2020 in back-to-back episodes. In fact, showrunner Peter M. Lenkov tells us that the Magnum half of the crossover has […]