Episode 1 | The Passenger

Magnum and Higgins weigh the risks of pursuing a relationship. Rick juggles being a new father and running La Mariana. Katsumoto tries to figure out his next move.

Episode 2 | The Breaking Point

Magnum and Higgins go undercover as lifeguards in order to solve a murder. Jin Jeong wins a storage unit auction and enlists the help of Rick and TC upon finding a stolen military medal.

Episode 3 | Number One with a Bullet

Katsumoto takes a job providing security for a chart-topping K-pop star. Higgins and Rick find themselves in peril while trying to help Rick's friend. Magnum harbors suspicions about Capt. Greene's death.

Episode 4 | NSFW

Magnum and Higgins search for a CEO who has mysteriously vanished. Rick braces for a visit from his wild-child little sister, Ruthie.

Episode 5 | Welcome to Paradise, Now Die!

Magnum recruits Katsumoto to help find a missing tourist. Higgins and Kumu attempt to solve the murder of a beloved dog. Rick enlists the aid of TC after he accidentally loses Magnum's pet mouse, Roberto II.

Episode 6 | Dead Ringer

Katsumoto's hearing date arrives and he will learn if his career in law enforcement is over for good or not. Magnum and Higgins are hired to investigate a man their client believes committed murder.

Episode 7 | Birthright

Magnum and Higgins investigate the robbery of an elderly man suffering from Alzheimer's. The ohana tries to help TC overcome a past trauma.

Episode 8 | Dark Skies

Magnum and Rick make a shocking discovery in the Capt. Greene case. Higgins and TC head to Maui to help an eccentric billionaire find the owner of a pesky drone harassing him. Shammy helps Kumu after an incident occurs at La Mariana.

Episode 9 | Out of Sight, Out of Mind

Magnum and Higgins take on a case that sends Higgins inside a psychiatric hospital. Katsumoto and his son, Dennis, head to the mainland to look at colleges, but their trip takes a harrowing turn when a run-in with a local turns ugly.

Episode 10 | Charlie Foxtrot

An armed hit team lays siege to Robin's Nest. TC is badly injured while Rick fights for his life.

Episode 11 | Hit and Run

Magnum and Higgins go to work for a dangerous and controversial client; Kumu and Shammy help move TC to a veterans' rehab facility; Rick flirts with a woman who works at the marina.

Episode 12 | Three Bridges

Magnum and Higgins try to help Zhao, a close friend of Kumu, recover her life savings that was all lost to a scammer. TC becomes increasingly frustrated at the lack of progress in his recovery and pushes everyone away.

Episode 13 | Appetite for Danger

Magnum and Higgins enlist Katsumoto to go undercover when a chef at a high-end restaurant goes missing. Kumu works with Cade at the Cultural Center, confronting one of America's darker chapters.

Episode 14 | Night Has a Thousand Eyes

Magnum and Rick race to find a missing witness who can exonerate an innocent man accused of murder. TC tries to repair his relationship with Mahina after being released from the VA.

Episode 15 | The Retrieval

Magnum and Higgins are hired to find a missing gamer whose online friends believe he might be in trouble. Jin enlists the help of TC in a treasure hunt after his ex-partner gets out of prison.

Episode 16 | Run with the Devil

Magnum and Higgins agree to help a teenage Amish boy who has traveled to Hawaii in search of his runaway sister. Rick sets out to find TC a date to the Marine Corps Ball.

Episode 17 | Consciousness of Guilt

After a high-stakes homicide case falls apart at trial, Katsumoto asks Magnum to help him stop a killer from walking free; Higgins helps Jin Jeong with a mystery of his own.

Episode 18 | Extracurricular Activities

Magnum and Higgins are hired by a university dean to investigate a professor who has been accused of having an inappropriate relationship with a female grad student. TC and Katsumoto take Cade and Dennis on a father-son camping trip.

Episode 19 | Ashes to Ashes

Magnum and Higgins reexamine a fatal arson investigation at the request of TC and Mahina, leading to a sinister discovery. Kumu volunteers with Rick at a veterans' crisis call center.

Episode 20 | The Big Squeeze

Magnum and Higgins take a major step forward in their relationship. At the same time, the past comes back to haunt them when a previous suspect becomes their client. TC aims to scale up Island Hoppers. Rick gets a new business par...