Season 20 of NCIS is set to welcome back familiar faces like Sean Murray, Wilmer Valderrama, Katrina Law, Gary Cole, Brian Dietzen, and more. Particularly noteworthy is Terry Polo’s return as Vivian Kolchak, promising an extra layer of intrigue to the unfolding storyline.
A significant shakeup in the 19th season was Mark Harmon’s departure, resulting in his character Leroy Jethro Gibbs choosing not to rejoin the team. While speculation swirls about Harmon potentially returning, the timing and certainty remain uncertain.

Fans eagerly await the potential return of Michael Weatherly, famed for his role as Anthony DiNozzo. Though Weatherly has hinted at a comeback, it appears unlikely in the near future as he’s currently on hiatus following the conclusion of “Bull.”

Terry Polo’s character, Vivian Kolchak, left a lasting impact in the Season 19 finale. Her mysterious actions and ties to Alden Parker’s storyline promise to bring suspense and anticipation to the upcoming season.