Here's what I'm thinking.

Rocky Carroll as Director Leon Vance and Adam Campbell as Dr. Donald “Ducky” Mallard — 'NCIS' Episode 500 "All Good Things" - CBS “It was amazing,” Campbell, who also returns as the character in the March 30 episode of NCIS: Origins,

“NCIS” dropped a bombshell Tuesday night — and this time, it wasn’t the explosive kind.

Don't try this on set.

As NCIS navigates another big cast transition, TVLine ranks the CBS drama's biggest exits ever, and how they shook up the show.

Carroll’s “NCIS” tenure was almost as long as McCallum’s. He joined the cast during season 5 in 2008. During an interview with TV Insider published on Tuesday, Carroll, 62, said it was “not [his] choice” to leave the show.

NCIS killed off Director Vance in a shocking twist for the 500th episode, and Rocky Carroll shared his initial reaction of asking why Vance had to die.

NCIS celebrated a milestone on CBS, airing its 500th episode, and it killed off one of the beloved characters from the long-running military police procedural.

The NCIS team mourns the shocking death of one of their own in the March 31 episode. The team also must tackle a new case, back at work after the decision to shut down their agency was reversed. “The world goes on,

CBS's NCIS Season 23 is back this week with its 500th episode. Titled, All Good Things, Episode 13 delves into the aftermath of the unexpected NCIS shutdown.

NCISs Sean Murray discusses the show's longevity, character evolution, and memorable moments in a retrospective interview for series' 500th episode.