Agent Jethro Gibbs is a fictional character from the television series NCIS. He serves as a special agent and the team leader of the NCIS Major Case Response Team. Known for his strong leadership skills and no-nonsense attitude, Gibbs is dedicated to solving crimes involving the U.S. Navy and Marine Corps. Gibbs is portrayed by actor Mark Harmon and is characterized by his strict adherence to rules and principles. He often relies on his instincts and experience to guide his team, which includes agents like Tony DiNozzo and Ziva David. Gibbs is also known for his signature coffee preference and his close relationships with his team members.