‘NCIS’: Big Reveals From 1000th Episode Special — Including What’s to Come

Brian Dietzen, Chris O'Donnell, Vanessa Lachey, Wilmer Valderrama, Gary Cole, Katrina Law, Sean Murray, Noah Mills, and LL Cool J — 'NCIS' Crossover
Sonja Flemming/CBS

It’s almost hard to believe, but the NCISverse reaches quite the milestone with the April 15 episode of the mothership, and to celebrate that, Entertainment Tonight put together NCISverse: The First 1,000.

The special both looks back at the very beginnings of NCIS—introduced as a two-parter on JAG—as well as the spinoffs that already exist, and ahead to the 1,000th episode itself and the two new shows still to come (the prequel Origins and the not-yet-titled Tony and Ziva series set in Europe). NCIS is currently in its 21st season and Hawai’i its third. Sydney is coming back for a second. Los Angeles aired 14 seasons, while New Orleans ended after seven.

Below, we’ve rounded up all the fun reveals from the special.

Cast’s Most Shocking Moments

Over the years and across the shows, there have been some unbelievable moments, from deaths to big relationship steps to major returns. And just like fans, the stars have the ones that surprised them the most.

Both Sean Murray (McGee) and Brian Dietzen (Dr. Palmer) name Kate’s (Sasha Alexander) death at the end of Season 2. “No one saw it coming—except if you go back and you look at the actual footage, you see Michael Weatherly [flinch] before she gets shot because he knows a burst of blood is about to hit his face,” Dietzen adds.

Sasha Alexander in 'NCIS'

CBS

Rocky Carroll (Vance) says his character’s wife being killed off, while Noah Mills (Jesse) points to Tennant (Vanessa Lachey) getting her arm broken in the Hawai’i Season 2 finale.

For Diona Reasonover (Kasie), hers is probably the same as many fans’: Ziva’s (Cote de Pablo) return in the Season 16 finale after she’d been presumed dead. “They didn’t tell me. I found out with America, and boy was I surprised,” Reasonover recalls. “I literally pulled the script up on my phone and was like, ‘That’s not supposed to happen.’”

Mark Harmon Made It All Possible

ET‘s Kevin Frazier, who hosts the special notes, “None of it would have been possible without the distinguished service of this man, who seemed to know right from the start just where the series was going.”

Gary Cole, whose Parker has taken as team leader following Harmon’s Gibbs retiring to Alaska, says, “He’s the reason the show got on the air, pure and simple. Solid movie career going. He was a go-to series lead actor.”

Weatherly (Tony) recalls the first thing Harmon said to him: “‘You eat lunch with the crew.’ And it wasn’t a question.”

In a 2003 interview, shown during the special, Harmon said, “This show will work as a team or go down as a team, and that’s how I’ve always looked at it.” (We’ve seen how true that is over the years with the various cast changes.)

NCIS‘ Early Days, Starting With JAG

Weatherly notes that he did over 300 episodes of the mothership (he’ll be returning in the upcoming Paramount+ spinoff about Tony and Ziva) and what stuck with him from his first day on set. “In the middle of my first paragraph, [creator] Don Bellisario walked onto the set and said, ‘What are you doing, modeling? Don’t just stand there. Surprise me! Entertain me!’ and I just changed my simple thing, which was I didn’t care who found me entertaining. I just entertained myself, and I’ve been doing that ever since.”

Two JAG Season 8 episodes introduced the characters of Gibbs, Tony, Ducky (the late David McCallum), and Abby (Pauley Perrette), who would go on to be part of NCIS. They were joined by Robyn Lively as Vivian Blackadder, who didn’t make it to NCIS—and is the role that Jennifer Aniston had been considered for. (Harrison Ford, Alec Baldwin, Kevin Bacon, Andrew McCarthy, and Patrick Swayze‘s names were all brought up to possibly play Gibbs.)

Harmon reveals that his character almost had a different name. “I read Leroy Jethro Gibbs and I said, ‘Wow, I like that name.’ Then for a brief second when I’d decided I really liked the idea and the project, the name changed. All of a sudden it was Bob Johnson or something like that,” he shares. “I just went, ‘What? No, it’s gotta be Leroy Jethro Gibbs,’ and the creator said, ‘No, you can’t play a guy named Leroy Jethro Gibbs.’ I said, ‘Why not?’ Then it went back, so I was happy about that.”

Originally, NCIS was pitched as Law & Order in the navy, half case and half courtroom, according to Frazier. But the investigation part tested best with audiences, who were also impressed with Harmon.

“Because it was two episodes of JAG, it wasn’t really a proper pilot,” says Weatherly. “And even when we started airing, they called it Navy NCIS, which is Navy Naval Criminal Investigative Service. You can’t make that up.”

Remembering David McCallum

NCIS Season 21 paid tribute to McCallum and his character with its second episode, which saw a surprise return from Weatherly, reprising his role as Tony. “That was a very emotional day, seeing everybody,” Weatherly says. “Not a dry eye on that set.”

According to Carroll, “David McCallum was 70 years old when the series started, 21 years ago. And the story goes he told his wife, ‘I’m 70 years old. What if this show goes seven years? That’s a long time.’ And he ended up being with the show for 20 seasons.”

What’s to Come in Episode 1,000, Prequel Origins & Tiva Spinoff

First of all, the good thing about the ever-growing franchise is that characters from shows that ended could easily come back; LA‘s LL COOL J is currently recurring in Hawai’i Season 3. Eric Christian Olsen (Deeks on LA) does point out in the special, “I’ve always said that Marty Deeks ain’t dead. I think there’s plenty of room for these characters to come back.” And Harmon acknowledges that he’s asked “a lot” about returning.

Harmon is returning to the franchise, in a way—as narrator and executive producer on the prequel Origins, following Gibbs beginning in 1991 as he starts his career as a newly minted special agent at the fledgling NIS Camp Pendleton office where he forges his place on a gritty, ragtag team led by NCIS legend Mike Franks.

“I think seeing Gibbs coming up as a young guy is going to be fantastic,” says Murray. Weatherly suggests, “maybe Mark Harmon can play Gibbs’ father.”

As for the Tony and Ziva spinoff coming to Paramount+, they’ve been raising their daughter, Tali, together. When Tony’s security company is attacked, they must go on the run across Europe, try to figure out who is after them, and maybe even learn to trust each other again so that they can finally have their unconventional happily ever after.

“Cote de Pablo and I are also getting ready. Moving to Budapest for the summer of 2024, and it is Tony and Ziva now trying to raise their tween daughter and save the world. What could go wrong?” Weatherly asks. “We’re incredibly happy to be making something for the streaming platform because it gives you a little bit more latitude and shooting overseas.”

But first, there’s the 1,000th episode of the franchise, NCIS‘ “A Thousand Yards,” NCIS comes under attack by a mysterious enemy from the past. Also, Vance tries to mend fences with his estranged son by explaining why, despite the ongoing dangers of his job, he still chooses to stay at NCIS.

“All of NCIS is suddenly put under attack, so now you get to see NCIS: Hawai’iNCIS: LANCIS: Sydney coming in to help,” teases Katrina Law (Knight). We already know Lachey and LA‘s Daniela Ruah (Kensi) are guest starring.

What are you hoping to see in the franchise’s 1,000th episode and upcoming shows? Let us know in the comments section, below.

NCIS Franchise 1,000th Episode, Monday, April 15, 9/8c, CBS