Romance, an Unsolved Mystery & More Teases for ‘NCIS’ Season 18

Mark Harmon NCIS Season 18 Gibbs Professional Personal Preview
Monty Brinton/CBS

Production has yet to begin on NCIS Season 18, but due to coronavirus shutdowns postponing at least one previously announced episode, we do have some idea of what’s in store this fall.

When the CBS procedural returns, it will be celebrating quite the milestone (the 400th episode) and going back in time to the beginning of one of boss Leroy Jethro Gibbs’ (Mark Harmon) key relationships. Plus, it’ll be time to reexamine a case from a couple years back.

Mark Harmon & 'NCIS' Bosses: Gibbs Isn't Just a 'Cowboy' in Season 18See Also

Mark Harmon & 'NCIS' Bosses: Gibbs Isn't Just a 'Cowboy' in Season 18

Mark Harmon and EPs Frank Cardea and Steven D. Binder preview Gibbs' next big move, the 400th episode, and more.

Scroll down for more on what you will and won’t see when Season 18 begins.

NCIS, Season 18, Fall 2020, CBS

David McCallum NCIS Ducky
Eddy Chen/CBS

Flashbacks

Call it “When Leroy Met Ducky….” Episode 400 explores the rich history between Gibbs and the longtime medical examiner (David McCallum)—a rare confidant.

Maria Bello NCIS Jack
Patrick Wymore/CBS

Romance

Gibbs and team psychologist Jack (Maria Bello) have chemistry, but “he has things to work on with himself before he’s ready to work on a relationship,” executive producer Frank Cardea says.

Joe Spano NCIS Tobias Fornell
Sonja Flemming/CBS

An Unsolved Mystery

The daughter of Gibbs’ old friend Fornell (Joe Spano) nearly died after OD’ing on counterfeit opioids. The Canadian supplier was never found, but it’s been hinted that Gibbs is still secretly on the hunt. The case comes to the forefront in Season 18.

Mark Harmon NCIS Season 17 Finale The Arizona Gibbs
Sonja Flemming/CBS

Everyone's Best Buddy Gibbs

The man has opened up to his team, yes, but don’t expect Gibbs at happy hour. “The team matters,” Harmon acknowledges, but “leadership often isn’t popular.”