Mark Harmon, best known for his role as Leroy Jethro Gibbs in the long-running TV series NCIS, has returned to the franchise with the spin-off series NCIS Origins. Five years after his last appearance in the main series, Harmon is back, this time as the voice of the show and as a central figure in the third season, which premiered on October 6. This marks the first time since 2021 that Harmon is leading a storyline as Gibbs, a character he has portrayed for over two decades. The third season of NCIS Origins begins with a gripping dual timeline narrative. In 1992, Gibbs is involved in a high-stakes investigation that includes the kidnapping of his colleague, Randy, by Russian agents. At the same time, the present-day storyline shows the consequences of this case catching up with Gibbs. The season's opening episode features a tense scene where two men break into Gibbs' home and shoot him in the chest. One of the attackers says they now only have one person left to kill, leaving viewers wondering who that person might be and whether Gibbs is truly dead. Later in the episode, it is revealed that Gibbs is still alive. He used a technique from his youth to slow his heart rate and feign death. After recovering, he retrieves his precision rifle and says, "It's time to get to work," before leaving by boat. In the 1992 storyline, Gibbs is reunited with his love interest, Lala, after their reconciliation at the end of the previous season. Together, they are deeply involved in the case surrounding Randy's kidnapping. This case appears to be connected to events in 2026, though the exact nature of that link remains a mystery. Mark Harmon will be a constant presence throughout the third season, contributing to a through-line plot that should satisfy longtime fans of NCIS. His return brings a sense of continuity and depth to the spin-off, which explores the origins of Gibbs and the early days of the NCIS agency. As the season unfolds, viewers are likely to see how past events shape the future of the franchise.