NCIS: Origins revealed more of the backstory of Special Agent Leroy Gibbs ( Austin Stowell) and NIS medical examiner Dr. Donald “Ducky” Mallard ( Adam Campbell) on tonight’s episode, and it was a surprise how much Gibbs’ friendship meant to Ducky and how little of it Gibbs remembered.

Gibbs gets a visitor at Camp Pendleton from DC Headquarters in a new NCIS: Origins Season 2, Episode 3 sneak peek. See the very special reunion here.

NCIS: Origins paid homage to the late Doctor Donald “Ducky” Mallard by introducing the first case he ever worked on with Gibbs. Not only did this introduce Duck

Mark Harmon, who spent 18 seasons on "NCIS," is reprising his role as special agent Leroy Jethro Gibbs for a crossover event.

As NCIS: Origins moves forward, fans can expect emotional complexity, professional stakes, and romance that’s both teased and restrained. Gibbs’ journey isn’t just about love — it’s about the making of a leader, a partner, and an agent whose choices reverberate across the franchise.

NCIS: Origins Season 2, Episode 2, "Who by Fire," flips the script on what audiences know about Mark Harmon's Leroy Jethro Gibbs character.