Thomas Magnum (Jay Hernandez) revs up his iconic red Ferrari for the exhilarating fourth season of "Magnum P.I." The charming Hawaii-based private investigator is back on the case with his trusted friends and allies, including partner Juliet Higgins (Perdita Weeks), war buddies Theodore "TC" Calvin (Stephen Hill) and Orville "Rick" Wright (Zachary Knighton), HPD Detective Gordon Katsumoto (Tim Kang) and supportive "house mom" Teuila "Kumu" Tuileta (Amy Hill). This season kicks off with Magnum trying to keep a new relationship hidden as he navigates cases alone while Higgins spends some time abroad.