Mark Harmon, the beloved actor who portrayed Leroy Jethro Gibbs on CBS’s “NCIS” for nearly two decades, has received exciting news: his latest project, the historical nonfiction book Ghosts of Honolulu, is set to be released on November 14. Co-authored with former NCIS special agent Leon Carroll Jr., the book delves into a pivotal World War II operation led by the Office of Naval Intelligence, shedding light on the origins of the real-life NCIS. Harmon, who left the show in 2021, emphasized his ongoing commitment to the NCIS legacy, stating, “I left the show, I didn’t retire.” ​

In addition to his literary endeavors, Harmon continues to be involved with the NCIS franchise. He serves as an executive producer and narrator for the prequel series NCIS: Origins, which premiered in October 2024. The show explores a young Gibbs’s early career in 1991, with Austin Stowell portraying the iconic character. Harmon makes a special appearance in the premiere episode, offering fans a glimpse into Gibbs’s life post-“NCIS.” ​
AP News

Harmon’s multifaceted involvement in both literary and television projects underscores his enduring connection to the NCIS universe. His upcoming book promises to offer fans a deeper understanding of the real-life foundations of the series, while his role in NCIS: Origins ensures that his legacy within the franchise continues to thrive.​
HELLO!