The Hawaii Five-0 and Magnum P.I. crossover is a two-part crossover event between Hawaii Five-0 and Magnum P.I. that aired on CBS. The event aired on January 3, 2020, with the Hawaii Five-0 episode "Ihea 'oe i ka wa a ka ua e loku ana?" which is Hawaiian for "Where were you when the rain was pouring?", followed by the Magnum P.I. episode "Desperate Measures". Jay Hernandez, Perdita Weeks, Zachary Knighton, Stephen Hill, Meaghan Rath, Katrina Law, and Beulah Koale appeared in both parts of the event as Thomas Magnum, Juliet Higgins, Orville "Rick" Wright, Theodore "TC" Calvin, Tani Rey, Quinn Liu, and Junior Reigns, respectively (Melissa Tang also guest starred in both parts as Erin Hong).
Cast and characters
Main The following contains a list of actors receiving main billing in the crossover event: Actor Character Episode Hawaii Five-0 Magnum P.I. Alex O'Loughlin Steve McGarrett Scott Caan Danny "Danno" Williams Ian Anthony Dale Adam Noshimuri Meaghan Rath Tani Rey Beulah Koale Junior Reigns Katrina Law Quinn Liu Taylor Wily Kamekona Dennis Chun Sgt. Duke Lukela Kimee Balmilero Dr. Noelani Cunha Chi McBride Captain Lou Grover Jay Hernandez Thomas Magnum Perdita Weeks Juliet Higgins Zachary Knighton Orville "Rick" Wright Stephen Hill Theodore "TC" Calvin Amy Hill Kumu Tim Kang Det. Gordon Katsumoto
Guests The following contains a list of notable guests appearing in the crossover event: Actor Character Episode Hawaii Five-0 Magnum P.I. Melissa Tang Erin Hong colspan="2" Jo Sung Charlie Fong Jason Lee Hoy Baldy Chad X Lerma Officer Hollis Ken Kirby Eli Sung Amy Tsang Loi Chau Terrence Arashi Elliott CIA Agent Lloyd Barachina Thug #1
Plot Part 1: "Ihea 'oe i ka wa a ka ua e loku ana?" McGarrett and the task force track down a suspect who might be connected to the stolen list of undercover CIA agents. When the suspect gets away, the task force run into Thomas Magnum and his partner, Higgins and discover that they are looking for the same suspect for a client they are looking after. McGarrett reluctantly begins working with Magnum and his team to try to find the stolen list. Meanwhile, Tani reaches out to Adam concerning about his wellbeing only for Adam to flee Hawaii. Also, after getting advice from Higgins, Tani asks Junior out on a date only to get kidnapped by thugs.
Part 2: "Desperate Measures" When Hong, a man that Magnum and Higgins are monitoring for a client, gets shot and killed and his killer escapes, the team from Hawaii Five-0 gets involved. Magnum, Higgins, TC and Rick assist as the group recovers a secret list of CIA double-agents. Soon after, Junior Reigns is kidnapped as leverage for the criminals to get the list back, leading to Magnum's team helping Tani Rey and Quinn Liu in a search-and-rescue mission.
Production Before the crossover, Hawaii Five-0 characters had crossed over to Magnum P.I., such as Kamekona (Taylor Wily), Duke (Dennis Chun), Noelani (Kimee Balmilero), Flippa (Shawn Mokuahi Garnett) and P.I. Harry Brown (William Forsythe). The showrunner for both shows, Peter M. Lenkov, had wanted to include MacGyver (also showrunned by Lenkov) in the crossover, but eventually it was decided to just do a Hawaii Five-0 and Magnum P.I. crossover.
Reception Critical response Dale McGarrigle with TV Fanatic said "Finally, a crossover that felt genuinely organic." and gave the episode an editorial rating of 4.5 out of 5 stars.
Viewing figures United States In the United States the first part of the crossover was watched live by 8.06 million viewers. Within seven days, the episode was watched by a total of 10.56 million viewers. The second part was watched live by 7.83 million viewers. Within seven days, the episode was watched by a total of 10.38 million viewers.
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