The Best 'Hawaii Five-0' Seasons, Ranked

Season 1 of Hawaii Five-O first premiered on September 20, 2010 and consists of 24 episodes. A reboot of the 1968 classic, the show follows the adventures of a specialized police task force who solve some of Hawaii's most notorious crimes.

Some of this season's most popular episodes include "Ua Hiki Mai Kapalena Pau," "Ke Kinohi," and "Hana 'a'a Makehewa."

Memorable moments from this season include:

• A high-school football game is interrupted when a gang war breaks out.
• The team must recover two kidnapped daughters of a U.S. ambassador.
• A Navy SEAL takes hostages after being suspected of killing his wife. 

Season 2 of Hawaii Five-O first premiered on September 19, 2011 and consists of 23 episodes. Season 2 introduces a new governor who wants to make changes to the task force.

Some of this season's most popular episodes include "Ua Hala," "Ha'i'ole," and "Ki'ilua."

Memorable moments from this season include:

• McGarret lands in prison after being suspected of the murder of the governor. 
• A young couple is murdered on a traditional Hawaiian burial ground while filming a documentary on Halloween night.
• The team investigates a suspicious plane crash.

Season 3 of Hawaii Five-O first premiered on September 24, 2012 and consists of 24 episodes. McGarrett discovers a shocking secret involving his mother who he thought died long ago. 

Some of this season's most popular episodes include "I Ka Wa Mamua," "Olelo Ho'Opa'I Make," and "Aloha. Malama Pono."

Memorable moments from this season include:

• McGarrett unravels his mother's surprising history.
• Adam rescues Kono from a deadly situation.
• Chin Ho must save his wife from being murdered by a career criminal.

Season 5 of Hawaii Five-O first premiered on September 26, 2014 and consists of 25 episodes. This season, the team faces villains such as their long time nemesis Wo Fat and a terrorist who is using weapons on civilians. 

Some of this season's most popular episodes include "Ka No'eau," "Ina Paha," and "Ho'oilina."

Memorable moments from this season include:

• O'ahu is put on lock down while the team hunts a deadly terrorist.
• Danny's brother is kidnapped for a large ransom.
• Adam proposes to Kono. 

Season 9 of Hawaii Five-O first premiered on September 28, 2018 and consists of 25 episodes. Throughout season 9, the team investigates major crimes including terrorism and trafficking. 

Some of this season's most popular episodes include "Ka ʻōwili ʻōka’i," "Hana Mao 'ole ka ua o Waianae," and "A'ohe Mea 'Imi A Ka Maka." The 200th episode of Hawaii Five-0 aired November 8, 2018.

Memorable moments from this season include:

• Danny travels to Mondana to reunite with McGarrett.
• The team has to investigate a remote submarine environmental lab.
• A crime wave and a heat wave take place at the same time.

Season 4 of Hawaii Five-O first premiered on September 27, 2013 and consists of 22 episodes. This season, the team faces situations ranging from helping a criminal avoid murder by breaking him out of prison to surprise visits from their relatives. 

Some of this season's most popular episodes include "Aloha Ke Kahi I Ke Kahi," "Ku I Ka Pili Koko," and "Ho'onani Makuakane."

Memorable moments from this season include:

• Steve is forced to go up against a SWAT commander.
• Kono and Adam's secret position is compromised.
• Danny's mom reveals that she is considering his dad.

Season 6 of Hawaii Five-O first premiered on September 25, 2015 and consists of 25 episodes. This season the team investigates crimes ranging from murders to a centuries-old pirate raid.

Some of this season's most popular episodes include "Malama ka Po'e," "Pa'a Ka 'ipuka I Ka 'Upena Nananana," and "O Ke Ali'i Wale No Ka'u Makemake."

Memorable moments from this season include:

• Steve wants to propose to Katherine, who he doesn't realize is hiding a secret.
• Danny donates bone marrow to his son.
• Kono tries to protect Adam from the Yakuza.

Season 7 of Hawaii Five-O first premiered on September 23, 2016 and consists of 25 episodes. Season 7 presents a new criminal mastermind who taunts the team. 

Some of this season's most popular episodes include "Makaukau 'oe e Pa'ani?," "Hana Komo Pae," and "Wehe 'ana."

Memorable moments from this season include:

• Chin fights for custody of Sara.
• Jerry gets his Five-O badge.
• Catherine informs the team that McGarrett's mother has been captured.

The tenth and final season of Hawaii Five-O first premiered on September 27, 2020 and consists of 22 episodes. The crimes and commitments everyone has been involved with over ten years wind together and bring the Five-0's stories to a close.

Some of this season's most popular episodes include A'ohe pau ka 'ike i ka halau ho'okahi," "Ne'e aku, ne'e mai ke one o Punahoa," and "Ihea 'oe i ka wa a ka ua e loku ana?"

Memorable moments from this season include:

• A rancher uncovers skeletons on his property.
• The Five-0 and the DEA team up.
• A kidnapped high school student turns out to be a hacker assasin.

Season 8 of Hawaii Five-O first premiered on September 29, 2017 and consists of 25 episodes. Throughout season 8, the team faces challenges such as the murder of a major crime boss, an ambushed drug bust, and a bank heist. 

Some of this season's most popular episodes include "Na La 'Ilio," "Kau Ka 'Onohi Ali'i I Luna," and "Make Me Kai."

Memorable moments from this season include:

• The team works with an injured police dog who was the only witness to a crime. 
• A hacker releases a dangerous criminal from prison.
• McGarrett and Danny consider a new restaurant venture.