Mark Harmon returns on-screen for NCIS Origins season 3

Mark Harmon will reprise his iconic role as Leroy Jethro Gibbs in a major on-screen capacity for the upcoming third season of "NCIS Origins," while "NCIS: Los Angeles" alum Eric Christian Olsen joins the prequel series as an executive producer. The announcements, made this week, signal significant creative developments for the CBS franchise as it prepares for its fall schedule.

Harmon, who narrates the series and serves as an executive producer, will appear on-screen in every episode of the ten-episode season. His return is structured as a season-long story arc, where the present-day version of Gibbs investigates a mystery tied to his early career at Camp Pendleton in the 1990s. This marks Harmon's most substantial involvement since he departed the original "NCIS" as a series regular in 2021, having previously made only brief cameo appearances in the prequel.

The third season will continue to follow a young Gibbs, played by Austin Stowell, during his rookie years with the Naval Investigative Service. The supporting cast includes Kyle Schmid, Mariel Molino, Tyla Abercrumbie, Diany Rodriguez, and Caleb Foote. The series is set to air on Tuesdays at 10 PM this fall on CBS and for...