1 season available
Katsumoto suspects that one of his fellow cops is dirty and has stolen evidence, so he begrudgingly asks Magnum and Higgins for help; Rick and TC help football player Aaron Donald when the tablet containing his playbook is stolen.
On Halloween, Magnum and Jin search for a skip tracer at a Halloween bash, while Katsumoto tracks an escaped killer who is headed to that same party; Higgins and Rick must spend the night at an allegedly haunted house to debunk it.
Magnum must help his defense attorney girlfriend when she realizes a client she successfully defended in a murder trial is actually guilty; TC confronts Kamekona about stealing his helicopter business.
Magnum investigates the death of a hotel guest who was thrown from her room's balcony while working on a secret investigation of her own; Icepick is released from jail and is trying to keep a secret from Rick.
Magnum and Higgins' new partnership is tested when they disagree about being hired by a woman who wants them to recover her $3 million in stolen drug money to save her husband's life.
A guilt-ridden Magnum follows the clues his private investigator friend left behind when he was shot while working a case Thomas passed onto him; TC helps Kumu lead a protest against construction on a Hawaiian sacred site.
Magnum is called up from the reserves for a top-secret mission, but his friends are stunned when they learn that the mission is a lie and Magnum has been set up.
When Junior is kidnapped as leverage to retrieve the stolen list of undercover CIA agents, Tani and Quinn ask Magnum and Higgins for their help.
Magnum and T.C. go undercover as efficiency experts when a corporate manager is murdered and everyone in the office is a suspect; Rick is curious why Higgins faked an injury to prevent her from investigating the case with Thomas.