Iris, yes been waiting this drama and finally I have watched it. I'll I can say, best action korean drama. Lee Byung Hun has succeeded played his role as an agent.
This drama is really worthed to watch, coz the combination between the scenes and music also good performance by the actor an actress.
Anyway for this season is open ending, where the main role is been shot. But yet, I hear that there will be second season, well I'm sure that we can get the answer by then.
Some more detail about IRIS you can click here!