Agah Bayar is a Turkish International Arms dealer that the NCIS team encounters from time to time. He is described as smart and with good instincts as he has avoided being arrested for a long time.
Biography
Pre-Series
NCIS Season 8
He is mentioned and seen for the first time in Broken Arrow (episode) when Anthony DiNozzo Senior gets the team into an event with many important people, when they are trying to solve a case. He has a long reach and knows a lot of high ranking people.
NCIS Season 9
He is also involved in the storyline of Need to Know (episode) when a sailor comes to Gibbs with sensitive information comes to Gibbs, and ends up dead before he could share what he knew about Agah Bayar.