Series Cast 21

1. 

   Park Hae-soo

   Kim Je-hyeok (16 Episodes)

2. 

   Jung Kyung-ho

   Lee Jun-ho (16 Episodes)

3. 

   Krystal Jung

   Ji-ho (16 Episodes)

4. 

   Lee Kyoo-hyung

   Looney (16 Episodes)

5. 

   Choi Moo-seong

   Min-cheol (16 Episodes)

6. 

   Jeong Min-seong

   Dr. Ko (16 Episodes)

7. 

   Park Ho-san

   KAIST (16 Episodes)

8. 

   Kang Seung-yoon

   Jean Valjean (16 Episodes)

9. 

   Jung Woong-in

   Lieutenant Paeng (16 Episodes)

10. 

    Jung Hae-in

    Captain Yoo (16 Episodes)

11. 

    Kim Sung-cheol

    Jailbird (16 Episodes)

12. 

    Im Hwa-young

    Kim Je-hee (16 Episodes)

13. 

    Kang Ki-doong

    Officer Song (16 Episodes)

14. 

    Choi Seong-won

    Mole Boy (16 Episodes)

15. 

    Sung Dong-il

    Chief Jo (16 Episodes)

16. 

    Kim Kyung-nam

    Lee Joon-dol (16 Episodes)

17. 

    Jung Moon-sung

    Captain Yoo's Brother (16 Episodes)

18. 

    Yeom Hye-ran

    Han Yang's mother (5 Episodes)

19. 

    Lee Do-hyun

    Young Lee Jun‑ho (3 Episodes)

20. 

    Shin Dong-hoon

    Reporter (1 Episode)

21. 

    Kim Joong-ki

    Minister of Justice's aide (1 Episode)

Series Crew 2