Teach You a Lesson — S1E6

• Kim Moo-yul (Na Hwa-jin)
• Lee Sung-min (Choi Kang-seok)
• Jin Ki-joo (Im Han-rim)
• P.O (Bong Geun-dae)

• Jang Yo-hoon (Min Ji-ung)
• Leem Hyun-mook (Yun Min-su)
• Yoon Tae-sik (Lee Du-hyeon)
• Choi Hyun-joon (Choi U-seong)
• Kim Kyun-ha (Kim Su-gyeom)
• Do Geon-wu (Na Jung-hwan)
• Choi Jae-sup (Prison Officer Kang (uncredited) (archive footage))
• Bae Seong-il (Prison Warden)
• Cho Yu-jin (Ji-ung's Mother)
• Yeo Min-goo (Min-su's Father)
• Jang Ji-yong (Du-hyeon's Father)
• Yoo In-hye (U-seong's Mother)
• Eom Ji-man (Head of the Women and Youth Division)
• Ahn Chan-woong (Detective of the Women and Youth Division)
• Lee Hyung-joo (Homeroom Teacher)
• Kim Yu-bin (Female Student from Hyeonjin Middle School 1)
• Ahn Ha-young (Choi Ga-yun)
• Kim Jong-soo (Hwang Gi-tae)
• Lee Bong-joon (Cho Gyu-cheol)
• Lee Yeo-jin (Anchor)
• Kim Chae-eun (Oh Yun-jin)
• Kim Dong-ryul (Red Name Tag)
• Kim Jeong-hoon (Red Name Tag)
• Kim Hyeon-ho (Red Name Tag)
• Lee Won-jun (Red Name Tag)
• Jang Min-jun (Red Name Tag)
• Jeong Gyu-yeong (Red Name Tag)
• Park Jin-su (Newly Admitted Inmate)
• Kim Da-hwi (General Inmate)
• Kim Yeon-jun (General Inmate)
• Park Eun-ho (General Inmate)
• Park Jae-beom (General Inmate)
• Seo Seung-jae (General Inmate)
• Yang Young-moon (General Inmate)
• Oh Dae-yang (General Inmate)
• Youn-ha (General Inmate)
• Jang Seong-won (General Inmate)
• Han Zi-hun (General Inmate)
• Hong Sung-bae (General Inmate)
• Lee Yeon-xin (General Inmate)
• Seo Jeong-min (Male Student from Hyeonjin Middle School 1)
• Oh Min-wook (Male Student from Hyeonjin Middle School 2)
• Lim Jin-sung (Male Student from Hyeonjin Middle School 3)
• Lee Ye-jin (Female Student from Hyeonjin Middle School 2)
• Mo Yoon-hee (Female Student from Hyeonjin Middle School 3)
• Jang Pil-sang (Teacher)
• Oh Joo-suk (Jinwon High School Security Guard)
• Na Kyung-chul (Reporter)

No crew information listed for this episode.