Season 1
Episodes
1 Who Killed Chairman Lee? (1) May 10, 2014 
2 Who Killed Chairman Lee? (2) May 17, 2014 
3 Who Killed Classmate Sarah? (1) May 24, 2014 
4 Who Killed Classmate Sarah? (2) May 31, 2014 
5 Who Killed Office Team Leader? (1) Jun 7, 2014 
6 Who Killed Office Team Leader? (2) Jun 14, 2014 
7 Who Killed Prisoner Lee? Jun 21, 2014 
8 Who Killed the Doctor's Wife? Jun 28, 2014 
9 Who Killed Referee Shin? Jul 5, 2014 
10 Who Killed Actress Jun? Jul 12, 2014