Episodes: Series - Hawaii Five-0 S9 - 2018

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When a CIA agent friend of Steve's is murdered, McGarrett allows himself to be taken by the gang he believes is to blame.

Danny and Tani look for a vacationing father who was abducted while traveling to Honolulu through the jungle in order to save him.

A heat wave is seriously affecting the island's residents. Steve and Danny are looking for a killer.

The coffin of U.S. Air Force SSGT Kaliko Christopher is escorted by Junior Reigns and Jerry Ortega from Dover, Delaware, to Hawaii. Duke must retire by force.

While at camp in 1982, little Jerry saw a murder, and as he returns to the camp in the present, he is telling his friends what happened. Junior and McGarrett speak with Katie.

While looking into the death of his former SEAL partner, McGarrett crosses the line and is taken into custody. Adam comes to Oahu with some heartbreaking information regarding his marriage.

The team works to solve the mystery of a 1930s–1940s case involving Chang Apana.

When Lou's family comes for a visit during Thanksgiving, the long-running dispute with his brother is once again reignited. A home burglar is discovered unexpectedly dead.

After one citizen's arrest leads to the death of a well-known urban vigilante, Five-0 searches the world of super heroes and comic books for the murderer.

Steve's last SEAL unit comes together to protect themselves because of a mission from his past. The crew learns that a group is trying to destroy Division Five-O.

To put an end to a string of crimes on the island, Steve works alongside Katherine, Danny, Junior, and their former friends to find the culprit.

When Grace is involved in a fatal car accident, McGarrett and the crew help Danny and Rachel by investigating what happened.

In order to solve the murder that occurred in a distant underwater facility, Adam, Junior, and Tani go to the bottom of the Pacific Ocean.

McGarrett and Grover put together a deadly plan to capture a group of criminals on the island while looking into the death of Flippa's friend.

The Five-0 has to protect a federal prisoner with a history of fleeing as a hurricane hits Oahu.

When a woman mysteriously drowns in a pool, there are concerns that she may have been the victim of a murder. Adam helps the team solve the mystery of the swimming woman's murder.

In order to prevent them from robbing a different bank on the island, the team must track down a bunch of killers and bank robbers.

In order to find a dangerous criminal, Tani and Junior go gym-hopping undercover. McGarrett and Danny serve as a high-ranking person's bodyguards.

Grover and Adam investigate the killing of a gambler, and the team discovers that the victim of the murder of a window washer turns out to be a well-known street artist.

In order to fully understand the situation and save the teen girl before she commits a crime that might affect her life, the team must look for her, as she purchased a weapon from a drug dealer.

Five-0 is looking into a 20-year-old case involving an abducted child whose father never gave up searching for her in relation to the murder of a man whose body might hold the answer.

An unidentified assailant kidnaps Noelani and Dr. Chu with the intention of using them as evidence in a terrifying crime. Adam looks into the death of an undercover FBI agent.

Tani is escorted to a wedding by Junior. McGarrett assists his sister in observing suspicious neighbors.

Aaron Wright, a hacker, criminal, and runaway, asks the Five-O team for assistance in locating a former coworker who may provide evidence of his innocence.

Aaron Wright, a fugitive criminal, continues to be pursued by Five-0 so that he won't be able to sell cyberweapons to the top purchaser.