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NCIS Database. in: Real World Articles, Real World Americans, Real World Writers. Leon Carroll, Jr. is a technical adviser for NCIS. After the United States Marine Corps, Carroll later joined the real-life NIS/NCIS agency and worked there for two decades as a Special Agent before retiring.
- 3 min
Jun 30, 2023 · Mark Harmon, known for his role as Leroy Jethro Gibbs on NCIS, and Leon Carroll Jr., a former NCIS special agent and the show’s technical advisor, have partnered up to co-author the...
Jun 30, 2023 · NCIS vet Mark Harmon and tech advisor/former Special Agent Leon Carroll Jr. have teamed on a non-fiction book that chronicles a World War II operation led by the ONI (Office of Naval...
- Matt Webb Mitovich
Jun 29, 2023 · Leon Carroll Jr. is the technical advisor on the hit drama NCIS. A native of Chicago, Illinois, he attended Lindblom Technical High School and went on to earn a BS degree in business...
Nov 10, 2023 · Nov 10, 2023. In his latest adventure, the NCIS star Mark Harmon, 72, teams up with former real- life NCIS Special Agent and technical advisor to the TV series, Leon Carroll, Jr. They’ve...
Actor Mark Harmon and NCIS technical advisor, retired special agent Leon Carroll Jr., join "CBS Mornings" to discuss their new book "Ghosts of Honolulu" and their time working on the hit CBS...
- 6 min
Nov 16, 2023 · Host Lori Rosales is joined by actor Mark Harmon, the former lead star of “NCIS,” and Leon Carroll, Jr., a former NCIS Special Agent and technical advisor for the TV show. Together, they have co-authored a book titled “Ghosts of Honolulu: A Japanese Spy, A Japanese American Spy Hunter, and the Untold Story of Pearl Harbor.”
