NCIS fans can look forward to seeing a familiar face in the near future. Actress Meredith Eaton will slip into her old role as "Carol Wilson" again this season.

Series star Wilmer Valderrama announced this happy news to fans on Instagram last week. Now, we finally know why "Carol" is returning — for the first time since season 11.

NCIS season 19: Meredith Eaton's "Carol Wilson" is back

The NCIS fanbase is buzzing about the comeback, and showrunner Stephen D. Binder has now commented on Eaton's appearance on the show.

"We're beyond excited to be able to work with Meredith Eaton again... Since her last guest appearance in Season 11, we've been chomping at the bit to have her back whenever her schedule allowed," Binder told TV Insider.

As for why "Carol" is back at NCIS, Binder explained: "And now, with the team desperately needing the help of an expert immunologist, who better than Meredith's beloved 'Carol Wilson' to come and save the day?"

We don't yet know what danger will present itself to the team, but "Carol," who works at the Center for Disease Control, will serve as immunologist at NCIS. But you have to wonder if COVID-19 will be impacting the agents once again.

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NCIS: Meredith Eaton will appear as "Carol Wilson" in season 19.

Another recent NCIS surprise was the long-awaited comeback of "McGee's" wife "Delilah," played by Margo Harshman. And then there are the unending rumours of possible guest appearances by "Tony DiNozzo" and "Gibbs"...

Season 19 aired its mid-season finale this Monday, and the show is now on hiatus until the New Year. Expect to see "Carol Wilson" as immunologist on NCIS in 2022.