MarkHarmon, born on Sept. 2, 1951, is no doubt the most well-known NCIS agent on television—and perhaps even off-screen. But before he was taking down bad guys, Harmon was a budding football ...
NCIS: Origins introduces viewers to a young Leroy Jethro Gibbs as he starts his career at NCIS. The series uncovers key events in his life. It includes personal tragedies and professional challenges.
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