TV series
Let us protect you!
An inspector from the Educational Rights Protection Bureau (ERPB) who is authorized by the government to use physical intervention and unconventional methods to discipline delinquent students and reform the educational system.
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Checked Jul 22, 2026
An inspector from the Educational Rights Protection Bureau (ERPB) who is authorized by the government to use physical intervention and unconventional methods to discipline delinquent students and reform the educational system.
Cast, crew and production details
Kim Moo-yulNa Hwa-jin
Lee Sung-minChoi Kang-seok
Jin Ki-jooIm Han-rim
Pyo Ji-hoonBong Geun-dae
Kim Jong-sooHwang Gi-tae
Ahn Ha-youngChoi Ga-yun
Lee Bong-joonCho Gyu-cheol
Lee Chan-yongKim Gyeong-min
Netflix
GTistSouth Korea
YLABSouth KoreaWatch options above are for the show and may vary by season or episode.
Episode 1
Inspector Na Hwa-jin steps into the chaos and takes control of a school plagued by the spoiled son of a powerful politician — to teach him a lesson.
Guest stars Lee Chan-yong, Lee Seung-gyu, Jeong Soo-hyun, Kim Do-gun, Kang Joon, Song Young-gyu, Kim Eun-seok, Lee Ha-ye
Where to watch Teach You a Lesson
Episode 2
With unassuming Bong Geun-dae on his side, Hwa-jin uses his special ops skills to handle a school gang and defend a student who just wants to study.
Guest stars Jeon Bong-seok, Ok Jin-uk, Yoo Tae-joo, Lee Tae-hwan, Seong No-jin, Byun Yun-jeong, Kim Chan-hyung, Yoon Woon-yong
Where to watch Teach You a Lesson
Episode 3
When a teen influencer spreads false claims about her teachers, the team's loose-cannon Inspector Im Han-rim steps in to set the record straight.
Guest stars Lee Sang-hee, Park Seo-yun, Kim Se-yeon, Kwon Hyuk, Lee Si-young, Jeong Seo-yeon, Park Yong, Seo Dong-hyeon
Where to watch Teach You a Lesson
Episode 4
Choi Gang-seok weathers a political attack on his bureau. Hwa-jin's team visits an elite school to uncover why a student attacked a respected teacher.
Guest stars Jeon Bong-seok, Ok Jin-uk, Yoo Tae-joo, Park Seo-yun, Choi Deok-moon, Bae Jun-hyung, Sim Su-bin, Kim Sun-hoa
Where to watch Teach You a Lesson
Episode 5
When an elementary school teacher's spirit wears down under pressure, Hwa-jin steps in to be her substitute — turning the tables to solve the case.
Guest stars Song Si-an, Yoon Hyun-gil, Jang Hee-jung, Choi Ja-woon, Park Ji-yeon, Kim Ye-rin, Kwon Dong-ho, Kang Ji-eun
Where to watch Teach You a Lesson
Episode 6
Four juvenile delinquents think they're above the law — until the team takes an interest in their extracurricular crimes and gives a harsh reality check.
Guest stars Jang Yo-hoon, Leem Hyun-mook, Yoon Tae-sik, Choi Hyun-joon, Kim Chae-eun, Kim Kyun-ha, Do Geon-wu, Choi Jae-sup
Where to watch Teach You a Lesson
Episode 7
Geun-dae goes undercover to help a father find his gambling addict son. To undermine the bureau politically, Hwang Gi-tae visits a juvenile inmate.
Guest stars Jang Yo-hoon, Leem Hyun-mook, Yoon Tae-sik, Choi Hyun-joon, Kim Kyun-ha, Do Geon-wu, Bae Jae-young, Jo Eun-sol
Where to watch Teach You a Lesson
Episode 8
After a pre-med student collapses in class, Hwa-jin investigates his obsessive mother, whose access to illicit pills hints at a larger conspiracy.
Guest stars Kim Tae-young, Seo Young-hee, Lee Seok-jun, Yoon Young-min, Cho Yeon-jin, Chang Eun-ah, Lee Seo-han, Jo Jae-young
Where to watch Teach You a Lesson
Episode 9
To help a student escape his exploitative friends, Han-rim adopts a new persona to join his circle. Cho Gyu-cheol's return puts the bureau in danger.
Guest stars Lee Woo-je, Kim Jae-seon, Kim Da-huin, Baek Ji-hye, Choi Jae-sup, Shin Dong-jun, Lee Seung-noh, Lee Jung-hwa
Where to watch Teach You a Lesson
Episode 10
After public backlash hits the bureau, Hwa-jin and his team go rogue to expose a deadly conspiracy led by a violent student-run gang.
Guest stars Lee Sang-hee, Lee Woo-je, Kim Jae-seon, Lee Ga-yeon, Jeon Seung-hoon, Lee Seung-noh, Lee Jung-hwa, Moon Dong-ho
Where to watch Teach You a LessonEpisode information updated Jul 22, 2026
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