However, she has stepped back from acting over the past few decades, making only a few appearances on screens.
This will also not be the first time Harmon’s family have appeared in the show either.
His son Sean Harmon has starred in several episodes as a younger version of his character.
Most recently, he played a young Leroy Gibbs in the special 400th anniversary episode of the series.
NCIS season 18 airs on CBS on Tuesdays and FOX UK on Fridays.