NCIS will be off the air until January, but new spoilers reveal what action the next episode will bring.

The episode, titled "Kill Chain," will involve a lethal terrorist drone and Leroy Jethro Gibbs' ex-girlfriend Hollis Mann (Susanna Thompson).

Mann and Gibbs became romantically involved in the season 4 episode, "Sharif Returns." The relationship lasted until she realized how much he was still grieving for his wife Shannon and daughter Kelly, who both died in a car crash.

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The NCIS team will partner with Hollis and the Department of Defense to track down the dangerous terrorist device before it can be used in a massive attack. The device is linked to the terrorist Benham Parsa.

In the meantime, Timothy McGee wants to take time off from work to attend a black-tie gala held for his girlfriend. This means fans will get to see more of Delilah Fielding (Margo Harshman) in the upcoming episode.

The show's executive producer, Gary Glasberg, previously spoke about the relationship between McGee and Delilah and said it was an aspect of the season he was enthusiastic about.

"That's a relationship that we're having some fun with, and we've got some plans in store," he told Entertainment Weekly in October. "I'm excited about it, actually."

NCIS will come back on air on Tuesday, Jan. 7 at 8 p.m. EST. on CBS.

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