NCIS: How Mark Harmon's Gibbs Can Return

screenrant.com:

If Mark Harmon's Gibbs ever does return to NCIS, here's how it might happen. Harmon has been a member of the NCIS family ever since it emerged as a JAG spinoff in 2003, playing the steely-eyed leader of the procedural's core team. As Leroy Jethro Gibbs, the actor anchored the series and stood at the center of some of its most emotional storylines. This explains why so many viewers were thrown off when just four episodes into NCIS season 19 Gibbs left the team to stay behind in Alaska, having achieved the kind of peace he had long been searching for after his wife and daughter's deaths.

Since his departure, NCIS has referenced Gibbs several times, but the show hasn't given much of an indication of his return. Harmon remains a key member of the show's creative team, as he is an executive producer and is still the first name that appears in the opening credits. While NCIS has shifted its focus to welcome the team's newest leader, Alden Parker (Gary Cole), to the action, it is clear that Gibbs looms large both for the characters and the fans of the CBS show.

Related: NCIS: How Gibbs Gets His Boat Out Of The Basement

Though nothing is officially in the works, it seems likely that Gibbs could return to NCIS in the future. Recently, longtime NCIS series star Sean Murray commented on the possibility that Harmon could put in another appearance at some point down the line, admitting, "I really, truly believe that the Gibbs could pop up somewhere." This is because Harmon does still return to the NCIS set and holds ties to the series. Now that Murray has agreed that a potential Gibbs reappearance could happen, the question now becomes this: what could possibly bring Gibbs back to the fray?

Considering Gibbs' fierce loyalty towards