KBS Spy Action Blockbuster "IRIS" with Korean subtitles

The Korean drama currently airing on KBS2TV, with waterwood series ratings approaching 40%. I've been recently watching this show, and the online playback is available as a series of episodes (updated to episode 18 at the time of posting).

Introduction: "IRIS", Korea's first spy action television series, is set against the backdrop of the National Security Service (NSS) and tells the story of its officers as they maneuver and fight against criminal organizations. With a production budget of 20 billion Korean won, the show stars major male actors Lee Byung-hun, Jung Joon-ho, and Kim Seong-woo, alongside beautiful actresses Kim Tae-hee and Kim Soo-yeon. Additionally, T.O.P, a member of Korea's popular boy band BigBang, also joins the cast, making for an incredibly strong lineup of actors.