Ncis: Origins stars Austin Stowell as Leroy Jethro Gibbs, Mariel Molino as Special Agent Cecilia ‘Sissy’ LaCroix, and Kyle Schmid as Mike Franks.
Main cast
- Leroy Jethro GibbsAustin Stowell1Main
- Special Agent Cecilia ‘Sissy’ LaCroixMariel Molino1Main
- Mike FranksKyle Schmid1Main
Supporting cast
- Special Agent Lala DominguezMarianne Stipek1Supp
- Special Agent Thomas ‘Tommy’ KoyamaKaiser Ahmed1Supp
- Vera StricklandDiany Rodriguez1Supp
- Young Edward ‘Ed’ MullenDaniel Di Tomasso1Supp
Guest & voice
- J.T. StricklandDerek Smith1Guest
- Mary Jo HayesJuliana Harkavy1Guest
- RandyZachary S. Williams1Guest
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About this cast
NCIS: Origins is a prequel series focusing on a young Leroy Jethro Gibbs, played by Austin Stowell, as he begins his career as a special agent in the early 1990s. The show follows Gibbs under the mentorship of Mike Franks (Kyle Schmid) and alongside fellow agent Cecilia ‘Sissy’ LaCroix (Mariel Molino), exploring the events that shaped him into the character from the original NCIS series.
FAQs
Who plays Leroy Jethro Gibbs in NCIS: Origins?
Austin Stowell portrays a young Leroy Jethro Gibbs in the prequel series.
Is NCIS: Origins a direct prequel to NCIS?
Yes, it is set in 1991, following Gibbs in his early days at the NIS (Naval Investigative Service) before it became NCIS.
Who plays Mike Franks in NCIS: Origins?
Kyle Schmid takes on the role of Mike Franks, Gibbs’s mentor and friend.
When did NCIS: Origins first air?
The series premiered on 14 October 2024 on CBS in the US and later on Sky Witness in the UK.
How many episodes are in season 1 of NCIS: Origins?
The first season consists of 13 episodes.
Sources & where to watch: IMDb · Wikipedia · Where to watch (JustWatch UK) · Updated June 2026