A Killer Paradox 1x5 Episode 5 Season 1 Season 1 8 Episodes As Nan-gam notices a clear pattern among the recent murders, he searches for Tang — unaware of another mysterious man who is doing the same. 1x1 - Episode 1 1x2 - Episode 2 1x3 - Episode 3 1x4 - Episode 4 1x5 - Episode 5 1x6 - Episode 6 1x7 - Episode 7 1x8 - Episode 8