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 T.O.P of Big Bang. It aired on KBS2 from October 14 to December 17, 2009 on Wednesdays and Thursdays at 21:55 for 20 episodes.
With a budget in excess of 20 billion won, it, along with its spin-off Athena: Goddess of War, share the record for the most expensive Korean dramas ever produced. The series was a critical and commercial success, with an average viewership of over 30% in addition to ranking as the top program consistently every week after its debut. The series also took home many of the highest honors at the 2009 KBS Drama Acting Awards, including Lee Byung-hun winning the top recognition, the Daesang Award. Among other nominations and recognitions, Lee and Kim Tae-hee were also named as one of the best on-screen couples.
The plot revolves around two friends from the 707th Special Mission Battalion recruited into a secret South Korean black ops agency known as the National Security Service. Of the pair, recruit Kim Hyun-jun begins to uncover evidence that his foggy past may not be so irrelevant to his joining of the secret organization after all. 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.