iris 2 was inevitable since iris 1 left alot of unanswered questions. it goes deeper to reveal who mr black is and iris and the story of the infamous baek san. they did a good job trying to connect the two stories and each having their own entity. it started getting better from ep 12 and the ending was satisfying. i dont usually like idol actors but doo joon and lee joon did an excellent job. the solo missions in both series were the best story lines then the girlfriends. i was not really impressed with lee bum soo's character. i like him as an actor but this role was just not for him. he tried to bring and show his goofiness but it dint work for me. part one is still my favorite because i am biased with lee byung hoon but hes an excellent action actor nontheless. jang hyuk was awsome esp after his memory loss. the action scenes were really awsome. something else i noticed is the constant stealth marketing. they kept advertising and showing off samsung all through the show which started to become too much. anyways u must watch part one first so as to understand part two.