Leroy Jethro Gibbs is a fictional character from the television series NCIS, which focuses on the Naval Criminal Investigative Service. He is portrayed by actor Mark Harmon and serves as a special agent in charge of a team that investigates crimes involving the U.S. Navy and Marine Corps. Gibbs is known for his strong leadership skills, keen intuition, and a no-nonsense approach to solving cases. Gibbs has a distinctive personality, often characterized by his strict adherence to rules and a deep sense of loyalty to his team. He is also recognized for his iconic "Gibbs' Rules," a set of personal guidelines that he follows in both his professional and personal life. Throughout the series, Gibbs' backstory reveals his military background and personal struggles, adding depth to his character.