Now it has been confirmed by TV Guide magazine the 32-year-old actor will be coming back again in season 18. It's yet to be seen who could appear here, but one cast member is confirmed to be coming back. In Which 'NCIS' Episodes Did Mark Harmon's Son, Sean Harmon, Play Young Gibbs? So, which episodes, in particular, features Sean Harmon’s young Leroy Jethro Gibbs? Today, Mark Harmon is best known for playing Agent Leroy Jethro Gibbs in the CBS primetime procedural NCIS. The plane is carrying the bodies of six dead Marines from Afganistan. Today, Mark Harmon is best known for playing Agent Leroy Jethro Gibbs in the CBS primetime procedural NCIS. Be sure to follow her on Twitter. NCIS and its characters were originally introduced in a two-part episode of the CBS television series JAG in April 2003.The show premiered on September 23, 2003, in the United States.. We could expect more updates as to who's appearing in the coming weeks. Sean Harmon was born on April 25, 1988 in Burbank, California, USA as Sean Thomas Harmon. All content copyright 2011-2020 CarterMatt.com, This site uses cookies to track and store data. Sean also appeared in NCIS: Los Angeles, guest-starring in the NCIS: Los Angeles Season 6 episode Rage (episode) as Charlie Connor. Gibbs deals with him but goes on to experience flashbacks and fantasies (creating the need for a young Gibbs once more). Here’s to hoping the writers find a reason to bring back young Gibbs…and a younger Harmon once more. As first reported over by TV Insider, Mark Harmon’s son will be coming back for the 400th episode, where he is reprising his role as a younger version of Leroy Jethro Gibbs. Today, Mark Harmon is best known for playing Agent Leroy Jethro Gibbs in the CBS primetime procedural NCIS. Sean Harmon will return as Young Gibbs on NCIS Season 18, Episode 2. 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While many actors have come and gone — using the show as a springboard to subsequent leading roles — Harmon has remained the show’s guiding light since the start. When Abby can’t find the DNA of one of the six Marines, the team contemplates if one is still alive. NCIS season 18 just started filming, so we know that we’ll be waiting a little while to see any episodes coming up. As for “Mother’s Day,” the episode features Gibbs’ first mother-in-law. While it’s been a while since Sean Harmon has appeared in NCIS, more recent flashbacks in upcoming seasons could provide an opportunity. The episode followed the aftermath of an ambush behind a bar that left one Marine dead and another very ill. So, which episodes, in particular, features Sean Harmon’s young Leroy Jethro Gibbs? Harmon has remained steadfast in his commitment to the series for the last 17 seasons and counting. Why? The JAG episodes, "Ice Queen" and "Meltdown", served as pilot episodes for the show. Frank works to explain some of the flashbacks, and the episode ends with McGee announcing a decision and the team prepping to head out. “Engaged: Part 2” follows Gibbs and Ziva, who fly to Afghanistan to search for the missing Marine — she is alive and well and an extraction team winds up saving her before the episode’s conclusion. NCIS is an American action police procedural television series, revolving around a fictional team of special agents from the Naval Criminal Investigative Service.The concept and characters were initially introduced in two episodes of the CBS series JAG (season eight episodes 20 and 21: "Ice Queen" and "Meltdown"). Sean Harmon, Stunts: Dumb and Dumber To. When Abby can’t find the DNA of one of the six Marines, the team contemplates if one is still alive. Based out of Washington, D.C., the team includes special agents Caitlin Todd (Sasha Alexander), Anthony DiNozzo (Michael Weatherly), Timothy McGee (Sean Murray), Ziva David (Cote de Pablo), Eleanor Bishop (Emily Wickersham), Alexandra Quinn (Jennifer Esposito), and Nicholas Torres (Wilmer Valderrama), forensic specialists Abby Sciuto (Pauley Perrette) and Kasie Hines (Diona Reasonover), medical examiners Jimmy Palmer (Brian Dietzen) and Donald "Ducky" Mallard (David McCallum), medical examiners assistant Gerald Jackson (Pancho Demmings) and SIS attaché Clayton Reeves (Duane Henry). Sean is set to appear in the upcoming 400th episode of the show, which had been postponed from season 17. Sean Harmon also appeared in the 2009 episode “Deliverance” and the 2010 episode “Mother’s Day.” “Deliverance” follows the gang after Metro PD finds the body of an 18-year old marine. While it’s been a while since Sean Harmon has appeared in NCIS, more recent flashbacks in upcoming seasons could provide an opportunity. NCIS and its characters were originally introduced in a two-part episode of the CBS television series JAG in April 2003.The show premiered on September 23, 2003, in the United States.. Created by Donald P. Bellisario and Don McGill, and executive produced by Bellisario, Shane Brennan, Gary Glasberg, and George Schenck & Frank Cardea, NCIS stars Mark Harmon as Supervisory Special Agent Leroy Jethro Gibbs, in charge of NCIS' Major Case Response Team. Sean Harmon also appeared in the 2009 episode “Deliverance” and the 2010 episode “Mother’s Day.” “Deliverance” follows the gang after Metro PD finds the body of an 18-year old marine. “Engaged: Part 2” follows Gibbs and Ziva, who fly to Afghanistan to search for the missing Marine — she is alive and well and an extraction team winds up saving her before the episode’s conclusion. He will be reprising his role as the younger version of Gibbs in the 400th episode.