Perfect Number
A brilliant math teacher formulates the perfect cover-up after his neighbor murders her abusive ex-husband.
| Actor | Role |
|---|---|
 Ryoo Seung-bumSuk-go | Suk-go |
 Lee Yo-wonHwa-sun | Hwa-sun |
 Cho Jin-woongDetective Min-bum | Detective Min-bum |
 Kim Yoon-sungSang-joon | Sang-joon |
 Kim Bo-raYoon-ah | Yoon-ah |
 Lee Seok-junNam Tae-woo | Nam Tae-woo |
 Lim Sung-minJung-sook | Jung-sook |
 Kwak Min-hoChul-min | Chul-min |
 Kwon Hae-hyoTeam Leader | Team Leader |
 Nam Moon-chulDirector | Director |
| KKim Ah-ronGirl | Girl |
 Kim Joo-ryoungMadame | Madame |
 Park Hyoung-sooInvestigator 1 | Investigator 1 |
 Nam Yeon-wooInvestigator 2 | Investigator 2 |
 Lee Kyoo-hyungSuk-go (Teen) | Suk-go (Teen) |
 Dong Bang-wooInnkeeper | Innkeeper |
 Song Young-changLie detector investigator | Lie detector investigator |
 Choi Young-wooForensic team member #1 | Forensic team member #1 |