Art Director
Cinematography
Composer
Costume Designer
Editor
Martial Arts Director
Screenwriter & Director
Main Role
- Lee Jung Jae Main Role
- Park Hae Soo Main Role
- Jung Ho Yeon Main Role
- Wi Ha Joon Main Role
Support Role
- Oh Young Soo Support Role
- Anupam Tripathi Support Role
- Heo Sung Tae Support Role
- Kim Joo Ryoung Support Role
- Yoo Sung Joo Support Role
- Lee You Mi Support Role
- Kim Young Ok Support Role
- Kang Mal Geum Support Role
- Park Hye Jin[Sang Woo's mother]Support Role
- Yoon Young Kyun"No. 040" [Participant]Support Role
- Won Chun Gyu"No. 066" [Participant]Support Role
- Park Sun AhKim Mi Ok / "No. 107"Support Role
- Hong Woo JinOh Yeong Uk / "No. 118" (Ep. 1)Support Role
- Kim Dong Hyun"No. 196" [Participant]Support Role
- Kwak Ja Hyung"No. 278" [Participant]Support Role
- Im Ki Hong Support Role
- Yoon Seung Hoon Support Role
- Yang Mal Bok"No. 453" [Participant]Support Role
- Kim Dong Won"No. 303" [Participant]Support Role
- Jung Woo Hyuk"No. 96" [Participant]Support Role
- Kim Yoon Tae"No. 069" [Participant / Husband of "No. 070"]Support Role
- Jang Hyun Jin"No. 083" [Participant]Support Role
- Moon Byung Joo"No. 021" [Participant]Support Role
- Woo Young taek"No. 194" [Participant]Support Role
- Yang Mi Seon"No. 306" [Participant]Support Role
- Hyun Jin"No. 209" [Participant]Support Role
- Kim Won Joong"No. 245" [Participant]Support Role
- Hwang Youn Hee"No. 308" [Participant]Support Role
Guest Role
- Park Ji Hoon"No. 250" (Ep. 1)Guest Role
- Wie Ji YeonHa Sun Young [Teller] (Ep. 1)Guest Role
- Park Si WonCho Sang Woo [Young] (Ep. 1)Guest Role
- Kim Yeon Ung Guest Role
- Jo Ah In Guest Role
- Lee Seo Hwan[Gi Hoon's friend] (Ep. 1)Guest Role
- Kim Kyung Min[Man waiting to bet] (Ep. 1)Guest Role
- Hwang Jae Hoon[Loan shark enforcer] (Ep. 1)Guest Role
- Kim Bup Rae[Gi Hoon's loan shark] (Ep. 1)Guest Role
- Gong Yoo[Salesman at the station] (Ep. 1, 9)Guest Role
- Kim Min ShikKim Jin Woo [Police officer] (Ep. 2)Guest Role
- Lee Dong YongKim Sang Hyuk [Police officer] (Ep. 2)Guest Role
- Song Hyung SooYoon [Emergency Medical Center doctor] (Ep. 2)Guest Role
- Kim Sung Gon[Detective] (Ep. 2)Guest Role
- So Yun Ho[Detective] (Ep. 2)Guest Role
- Lee Choong Goo[Jang Deok Soo's subordinate]Guest Role
- Kim Seo Ha[Factory owner] (Ep. 2)Guest Role
- Kim Gye Seon[Dormitory owner] (Ep. 2)Guest Role
- Pyo Dong Jun[Ga Yeong's brother] (Ep. 2)Guest Role
- Jeon Hyun Sook[Fish shop customer] (Ep. 2)Guest Role
- Jang Jae Kwon[Ga Yeong's stepfather] (Ep. 2)Guest Role
- Kim Young Sun[Gi Hoon's friend's wife] (Ep. 2)Guest Role
- Choi Jae Sub[North Korean defector shelter employee] (Ep. 2)Guest Role
- Heo Dong Won"No. 028" [Worker] (Ep. 2-4)Guest Role
- Park Shi Wan Guest Role
- Lee Jung Joon[Administrator] (Ep. 3)Guest Role
- Chris Chan"No. 276" [Participant] (Ep. 4)Guest Role
- Kim Si Hyun"No. 244" [Participant] (Ep. 4-9)Guest Role
- Lee Ji Ha"No. 070" [Participant / Wife of "No. 069"] (Ep. 4, 6)Guest Role
- Yoon Young Keol[Surgery room guard] (Ep. 5)Guest Role
- Lee Doo Suk"No. 062" [Participant] (Ep. 6-7)Guest Role
- Moon Jung Dae"No. 151" [Participant] (Ep. 7)Guest Role
- Carla Avila[Girl in a leopard bodypaint] (Ep. 7)Guest Role
- John D. Michaels[VIP #1] (Ep. 7-9)Guest Role
- Daniel C. Kennedy[VIP #2] (Ep. 7-8)Guest Role
- Geoffrey Giuliano[VIP #4] (Ep. 7-8)Guest Role
- Lee Byung Hun Guest Role
- Lee Jung Hun[Banker] (Ep. 9)Guest Role
- Kim Min Che[Hair stylist] (Ep. 9)Guest Role
- Son Young Sun[Flower seller] (Ep. 9)Guest Role
- Yoon Don Sun Guest Role
- Jang YooDo Jeong Soo / "No. 17" [Participant]Guest Role
- Park Jung Eon"No. 073" [Participant]Guest Role
- Kim Hee Seo"No. 198" [Participant]Guest Role
- Min Tae Yul"No. 271" [Participant]Guest Role
- Lee Han Sol"No. 324" [Participant]Guest Role
- Son Won Kyung"No. 360" [Participant]Guest Role
- Go Byung Taek"No. 407" [Participant]Guest Role
- Oh Kyung Min[Big guy]Guest Role
- Choi Yoon Bin[Awl man]Guest Role
- Yoon Joo Man[Surgery room guard #2]Guest Role
- Kim Byung Chul[Speech management mask]Guest Role
- Jung Woo Jin[Child playing Squid Game #5]Guest Role
- Jo Kyung Jae[Boy 4 playing Squid Game]Guest Role
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