NCIS: Hawaiʻi season 1

The first season of the American police procedural television series NCIS: Hawaiʻi premiered on September 20, 2021, on CBS, for the 2021–22 television season, and concluded on May 23, 2022. The season contained 22 episodes.

NCIS: Hawaiʻi follows a fictional team of special agents from the Naval Criminal Investigative Service based in Hawaiʻi. The series stars Vanessa Lachey with Alex Tarrant, Noah Mills, Yasmine Al-Bustami, Jason Antoon, Tori Anderson and Kian Talan.

Main

 * Vanessa Lachey as Jane Tennant: The first female Special Agent-in-Charge of the NCIS: Hawaiʻi Field Office.
 * Alex Tarrant as Kai Holman: A new NCIS agent on the team who recently returned home to care for his father.
 * Noah Mills as Jesse Boone: Tennant's confidant and second-in-command, Boone is a former homicide detective in Washington, DC, who knows the islands' hiking trails well.
 * Yasmine Al-Bustami as Lucy Tara: The junior field agent of NCIS: Hawaiʻi, and Whistler's love-interest turned girlfriend.
 * Jason Antoon as Ernie Malik: NCIS: Hawaiʻi's cyber intelligence specialist
 * Tori Anderson as Kathrine Marie "Kate" Whistler: a Defense Intelligence Agency (DIA) Officer, later Federal Bureau of Investigation (FBI) Special Agent and NCIS-FBI liaison. Tara's love interest-turned-girlfriend.
 * Kian Talan as Alex Tennant: Jane's eldest child.

Recurring

 * Enver Gjokaj as Captain Joe Milius: Deputy Chief of Staff to Commander, Pacific Fleet, later reassigned to the Pentagon. He is also Jane's love interest; when his transfer was official, the two finally consummated their relationship.
 * Mahina Napoleon as Julie Tennant: Jane's youngest child.
 * Julie White as Maggie Shaw: Jane's former mentor and friend.
 * Sharif Atkins as Captain Norman 'Boom Boom' Gates
 * Seana Kofoed as Commander (Dr.) Carla Chase, a medical examiner assigned to Joint Base Pearl Harbor–Hickam.

Guest stars

 * Beulah Koale as David Sola: A New Zealand intelligence specialist.
 * Mark Gessner as Agent Neil Pike : A Coast Guard Investigative Service Agent.

Crossover

 * Wilmer Valderrama as Nick Torres: NCIS Special Agent who shares a past with Tennant.
 * Katrina Law as Jessica Knight: NCIS Special Agent.
 * Diona Reasonover as Kasie Hines: Forensic Specialist for NCIS.
 * Gary Cole as Alden Parker: NCIS Supervisory Special Agent of the MCRT.

Development
On February 16, 2021, anonymous sources told The Hollywood Reporter that deals were being finalized on a potential fourth series in the NCIS franchise, titled NCIS: Hawaii, as it neared a straight-to-series order from CBS. They also said that series would be created and executive-produced by Christopher Silber, Jan Nash, and Matt Bosack, with Silber and Nash also serving as co-showrunners. Unlike the other series in the franchise, it is not planned to start with a backdoor pilot within another series. The series location would also create potential crossover opportunities with CBS's other Hawaii-based drama, Magnum P.I. NCIS: Los Angeles previously crossed over with Magnum P.I.'s now concluded sister series, Hawaii Five-0, in 2012. The sources also said that the producers had already started looking for a director for a pilot and were working on hiring writers.

In early April 2021, it was reported that the series was expected to be picked up for the 2021–22 television season. On April 23, 2021, CBS officially ordered NCIS: Hawaii to series. Larry Teng was also announced to be executive producing the pilot episode. Bosack, Nash, and Silber wrote the pilot episode for the series. The series name was also officially changed to NCIS: Hawaii, adding an ʻokina in an effort to reflect the official spelling used in the Hawaiian language. On October 11, 2021, CBS picked up the series for a full season. On January 3, 2022, it was announced that a crossover with the nineteenth season of parent series NCIS would be taking place on March 28, 2022. Showrunners of both series had previously mentioned crossing over and CBS Entertainment President Kelly Kahl had stated that discussion about a crossover would start after NCIS: Hawaiʻi finished its first batch of episodes.

Casting
On April 7, 2021, it was reported that CBS was looking to cast a female lead for the NCIS: Hawaii making it the first series in the franchise to do so. The character for the female lead was tentatively named Jane Tennant, and casting for the role as well as other principal characters began around the same time. On April 30, 2021, it was announced that Vanessa Lachey was the first to be cast as a series regular, in the role of Jane Tennant. Meanwhile, Yasmine Al-Bustami and Jason Antoon were also cast as series regulars to portray Lucy and Ernie, respectively. It was later announced that Noah Mills had joined the cast as Jesse. Tori Anderson and Kian Talan were cast as series regulars in the roles of Kate Whistler and Alex. On July 8, 2021, Alex Tarrant joined the main cast as Kai and Enver Gjokaj was announced to be recurring as Joe Milius.

Former Hawaii Five-0 star Beulah Koale was cast as a guest star in the series' first two-part story. NCIS stars Wilmer Valderrama and Katrina Law, the latter of whom also starred on Hawaii Five-0, appeared as their NCIS characters in a crossover event. Gary Cole and Diona Reasonover also appeared as their NCIS characters in the crossover event.

Ratings
†These DVR ratings are based on Live + Three Day rating results