Let us protect you.
When respect collapses in schools, unconventional inspectors arrive to set things right — with sharp, no-nonsense lessons you won't find in textbooks.
Teach You a Lesson (Season 1)
Episode 1 (Episode 1) 8.5
Air date: 2026-06-05
Runtime: 52 min
Overview: 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.
Episode 2 (Episode 2) 8.1
Air date: 2026-06-05
Runtime: 57 min
Overview: 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.
Episode 3 (Episode 3) 9.3
Air date: 2026-06-05
Runtime: 72 min
Overview: 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.
Episode 4 (Episode 4) 8.8
Air date: 2026-06-05
Runtime: 68 min
Overview: 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.
Episode 5 (Episode 5) 8.5
Air date: 2026-06-05
Runtime: 66 min
Overview: 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.
Episode 6 (Episode 6) 9.8
Air date: 2026-06-05
Runtime: 69 min
Overview: 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.
Episode 7 (Episode 7) 9.0
Air date: 2026-06-05
Runtime: 64 min
Overview: 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.
Episode 8 (Episode 8) 10.0
Air date: 2026-06-05
Runtime: 60 min
Overview: After a pre-med student collapses in class, Hwa-jin investigates his obsessive mother, whose access to illicit pills hints at a larger conspiracy.
Episode 9 (Episode 9) 8.7
Air date: 2026-06-05
Runtime: 67 min
Overview: 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.
Episode 10 (Episode 10) 9.0
Air date: 2026-06-05
Runtime: 61 min
Overview: 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.
Seasons
Episodes 10