NCIS: Origins

Main

• Austin Stowell as Special Agent Leroy Jethro Gibbs, a newcomer to the Pendleton branch of the Naval Investigative Service, the precursor to NCIS
  • Mark Harmon reprises his role as the older Leroy Jethro Gibbs, a now-retired veteran NCIS agent who narrates the series
• Kyle Schmid as Special Agent Mike Franks, a seasoned agent and leader of the team. Franks was played by Muse Watson in the original series.
• Mariel Molino as Special Agent Cecilia "Lala" Dominguez, a former Marine determined to stand out in the male-dominated workplace
• Tyla Abercrumbie as Field Operation Support Officer Mary Jo Hayes, the self-described "Head Secretary in Charge"
• Diany Rodriguez as Special Agent Vera Strickland, a tough, no-nonsense agent. Roma Maffia played the character in the original series.
• Caleb Foote as Special Agent Bernard "Randy" Randolf, the team's golden boy^[7]

Recurring

• Tonantzin Carmelo as Tish Kwa'la, Mike Franks' girlfriend and "love of his life" until episode 15^[8]
• Patrick Fischler as Special Agent in Charge Cliff Wheeler, head of NIS's Pendleton Office^[9]
• Julian Black Antelope as Chief Medical Examiner Témet Téngalkat, an unfazed, experienced ME with the San Diego County Medical Examiner's Office who works alongside NIS; he is a member of the Payómkawichum tribe and the uncle of Tish Kwa'la.
• Michael Harney as Richard Kowalski, Evidence Custodian, who used to be Army chaplain/POW during the Korean War.
• Daniel Bellomy as Herman "Herm" Daniels, an NIS agent acting as the Evidence Custodian's assistant^[7]
• Bobby Moynihan as Woodrow "Woody" Browne, a forensic analyst
• Ely Henry as Philip Elertson, a chemist who works with Woody
• Matthew Henerson as Carl Loughlin, an NIS agent
• Eric Normington as Roger Murphy, a former NIS agent who had a gambling problem
• Aaron Wilton as Special Agent JJ Henneberry, an NIS agent
• Marisa Baram as Gail Price, an NIS secretary
• Robert Taylor as Jackson Gibbs, Jethro's father. The character was played by Ralph Waite in the original series before his death in 2014.^[7]
• Jared Bankens as Jamison "Bugs" Boyd, a criminal profiled by Vera
• Lori Petty as Dr. Lenora Friedman, an assistant medical examiner
• Adam Huber as Luke Fletcher, counselor at the VA, real Sandman
• Jeffrey Boehm as Dalton, an NIS agent
• Michael Shepperd as Smitty, bartender at Daly's tavern
• Eddie Alfano as Todd, a bouncer at Daly's Tavern.
• Kathleen Kenny as Diane Sterling, a Real Estate Agent and Leroy Gibb’s second wife. Melinda McGraw played the character in original series.
• Christopher Backus as Abe Pruitt, leader of the Range.
• Daphne Bloomer as Beth, member of the Range.
• Julien Crane as Stanley Turner, member of the Range.
• Kayla Maisonet as Nadia, a NIS secretary
• Miguel Gomez as Manny, a gang member who starts a relationship with Lala
• Philip Winchester as Mason Franks, Mike Franks' brother^[10]
• Gabriel Mann as Doug Westmont, a shady lawyer.

Guest

• DaJuan Johnson as FBI Agent Noah Oakley who works cases with the team and has a romantic past with Cliff Wheeler
• Lucas Dixon as FBI Special Agent Tobias C. Fornell. Joe Spano played the character in the original series.
• Claire Berger as Lara Macy. Lala's friend; military police investigator. Louise Lombard played the character in the original series' future Special Agent in Charge at the Office of Special Projects in Los Angeles.
• Adam Campbell as Dr. Donald "Ducky" Mallard, a liaison from D.C. headquarters and an old acquaintance of Gibbs. David McCallum played the character in the original series before his death in 2023. Campbell reprises the role after portraying the young Ducky in four episodes of the original series.^[11]
• Kelly Albanese as Julie Larsen, Lala’s Sister
• Thomas Crawford as Dr. Walter Magnus, Medical Examiner with NIS Headquarters at the Navy Yard in D.C. and NIS Chief Medical Examiner before Dr. Donald "Ducky" Mallard. Bob Newhart played the character in an episode of the original series.
• Shea Buckner as Dwayne Pride, a Sheriff's deputy turned NIS probie assigned to the NIS office in Panama who has a turbulent history with Gibbs. Pride was the protagonist of NCIS: New Orleans where he was played by Scott Bakula.

Pre-release

The announcement of NCIS: Origins resulted in the cancellation of NCIS: Hawaiʻi, leading to several angered fans boycotting Origins.^[31]

Critical response

The review aggregator website Rotten Tomatoes reported an 88% approval rating for the first season.^[32] Metacritic, which uses a weighted average, assigned the series a score of 62 out of 100 based on eight critic reviews, indicating "generally favorable" reviews.^[33] Following the cancellation of NCIS: Hawaiʻi, some fans criticized CBS's decision to add another NCIS franchise series.^[34]

Ratings