Is Mark Harmon coming back to NCIS amid exciting career career?

Mark Harmon delighted NCIS fans earlier this month when it was announced that the actor was set to release a non-fiction novel inspired by the show.

With rumors buzzing online about a possible return for Mark to the long-running CBS show, here's all we know on whether or not the star could make a comeback anytime soon.

Will Mark Harmon return to NCIS?

While it's been reported that Mark is currently undecided about returning to the long-running CBS drama, neither Mark nor CBS have commented on whether the former castmate is coming back.

Mark Harmon starred in the drama for 19 seasons

However, Mark's former cast members have previously teased his return. Rocky Carroll, who plays Leon Vance, told TV Line: "We might see Gibbs again. I think as long as this show stays on the air, there will always be a little bit of a tease that we might see Gibbs again.

"Gibbs is the moral compass. He's the moral compass that we all wish we had," he added. 

Mark Harmon departed from the show in 2021

Sean Murray said Mark's character could "pop up" somewhere in the future

She added: "In terms of his on-air appearances, we're just going to have to see how it plays out going forward."

What is Mark Harmon's new book about?

Mark's new book, which will be released on November 14, is titled Ghosts of Honolulu: A Japanese Spy, A Japanese American Spy Hunter, and the Untold Story of Pearl Harbor. It will tell the story of Japanese-American naval intelligence agent, Douglas Wada, and Takeo Yoshikawa, a Japanese spy sent to Pearl Harbor to gather intel on the U.S. fleet. 

Mark is releasing a book about the predecessor of NCIS

According to the story, it's all about a "game of cat and mouse played between Japanese and U.S. military intelligence agents" in Hawaii before World War II.