Iris is a 2009 South Korean espionage television drama series, starring Lee Byung-hun, Kim Tae-hee, Jung Joon-ho, Kim Seung-woo, Kim So-yeon and Choi Seung-hyun. The plot revolves around two best friends from the 707th Special Mission Group recruited into a secret South Korean black ops agency known as the National Security Service. As the two friends find their loyalties tested and forge new, unlikely alliances, the journey takes them from their home country to Hungary, Japan, and China where they find themselves at the center of an international conspiracy. It aired on KBS2 from October 14 to December 17, 2009, on Wednesdays and Thursdays at 21:55 for 20 episodes.