Main Characters Kim Moo Chan 12 main appearances Kwon Suk Joo 12 main appearances Joo Hyun 12 main appearances Joo Min 12 main appearances Kang Yoon Ji 12 main appearances Kim Jo Dan 11 main appearances Choi Jin Soo 11 main appearances Min Ji Young 11 main appearances Lee Min Soo / Lee Yun Seong 11 main appearances Kim Ji Hoon 11 main appearances Chae Do Hee 9 main appearances Park Chul Min 9 main appearances Yu Jung Hwan 7 main appearances Jung Jin Wook 5 main appearances
Recurring Guest Characters Ahn Gyu Chul 1 guest appearances KCSI Investigator 1 guest appearances Bae Gi Chul 1 guest appearances Elena 1 guest appearances Victim's Family 1 guest appearances Gangster 1 guest appearances Prisoner #1 1 guest appearances Prisoner #2 1 guest appearances Prisoner #3 1 guest appearances Oh Jung Ho 1 guest appearances Kang Ji Seok 1 guest appearances