Season Regulars 9

1. 

   Lee Jung-jae

   Seong Gi-hun / 'No. 456'

2. 

   Wi Ha-jun

   Hwang Jun-ho

3. 

   Park Hae-soo

   Cho Sang-woo / 'No. 218'

4. 

   HoYeon

   Kang Sae-byeok / 'No. 067'

5. 

   Oh Young-soo

   Oh Il-nam / 'No. 001'

6. 

   Heo Sung-tae

   Jang Deok-su / 'No. 101'

7. 

   Kim Joo-ryoung

   Han Mi-nyeo / 'No. 212'

8. 

   Anupam Tripathi

   Ali Abdul / 'No. 199'

9. 

   Lee You-mi

   Ji-young / 'No. 240'

Guest Stars 25

1. 

   Park Hye-jin

   Sang-woo's mother

2. 

   Kim Yeong-ok

   Gi-hoon's mother

3. 

   Kim Gye-sun

   Dorm owner

4. 

   Kim Min-sik

   Kim Jin Woo (Police 2)

5. 

   Lee Dong-yong

   Kim Sang Hyuk (Police 1)

6. 

   Anwesha Purkayastha

   Ali's wife

7. 

   Lee Seo-hwan

   Gi-hoon's friend

8. 

   Kang Mal-geum

   Gi-hoon's ex-wife

9. 

   Cho Ah-in

   Seong Ga-yeong

10. 

    Yun Seung-hun

    'No. 369'

11. 

    Yang Mal-bok

    'No. 453'

12. 

    Park Si-wan

    Sae-byeok's brother

13. 

    Im Gi-hong

    'No. 322'

14. 

    Min Tae-yul

    'No. 271'

15. 

    Heo Dong-won

    'No. 028' [Worker]

16. 

    Song Hyeong-su

    Yoon [Emergency Medical Center doctor]

17. 

    Kim Sung-gon

    Detective

18. 

    So Yun-Ho

    Detective

19. 

    Lee Chung-gu

    Gang member

20. 

    Kim Seo-ha

    Factory owner

21. 

    Pyo Dong-jun

    Ga Yeong's brother

22. 

    Jeon Hyun-suk

    Fish shop customer

23. 

    Jang Jae-kwon

    Ga Yeong's stepfather

24. 

    Kim Young-sun

    Gi Hoon's friend's wife

25. 

    Choi Jae-sup

    North Korean defector shelter employee

Crew 2