Lee Min-ki may have been stoic for (12 out of 16 eps?) most of his scenes, but when it comes to the subtle emotions, I don't think I've ever seen anyone nailed it like he did. His choice in remaining almost robot-like for the first half of the drama highly contrasted the emotions leaking out of him towards the end, perfectly displaying the growth in character through the series. Nothing screams acting like these understated emotions. Good job!!
Can't believe I'm crying watching B99. It just never fails to surprise me!