<P> On May 11, 2018, the network picked up the series . Co-creator and executive producer Peter M. Lenkov will serve as the showrunner . On May 16, 2018, CBS released a first video trailer for new series . The pilot episode was aired as a special preview prior to the series San Diego Comic - Con panel . </P> <P> On July 19, 2018, Lenkov announced that multiple crossovers have been planned with the ninth season of Hawaii Five - 0 . Lenkov confirmed that Kimee Balmilero and Taylor Wily will make guest appearances as their Hawaii Five - 0 characters, medical examiner Noelani Cunha and entrepreneur Kamekona Tupuola respectively . Balmilero is set to appear in episode one while Wily is set to appear in episode two . Meanwhile, Alex O'Loughlin's character, Steve McGarrett, is set to cross paths with Hernandez's character later in the season . </P> <P> On Wednesday, August 22, 2018, with the anticipated landfall of Hurricane Lane, a Category 4 hurricane, in Hawaii CBS reported that they "were closely monitoring the situation" but that production would continue as planned . The following day CBS temporarily shut down production of both Magnum P.I. and Hawaii Five - 0 until further notice . </P> <P> On February 20, 2018, Jay Hernandez was announced as the new Magnum . It was announced on March 2, 2018 that Perdita Weeks will play Juliet Higgins . According to a May 16, 2018 announcement, Magnum's best friend from U.S. Marines, Rick Wright, will be portrayed by Zachary Knighton . Three days later, it was announced that another one of Magnum's friends, Theodore "T.C." Calvin, will be played by Stephen Hill . On July 20, 2018, it was announced that Tim Kang would join the cast as Honolulu PD detective Gordon Katsumoto, who will develop a friendly rivalry with Magnum as they work cases . Finally, it was announced on July 25, 2018 that Amy Hill had been cast in a recurring role . Hill and Kang both debuted in the series' third episode . </P>

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