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Undercover High School

Updated: 12/10/2025, 5:47:48 PM Wikipedia source

Undercover High School (Korean: 언더커버 하이스쿨) is a 2025 South Korean action comedy spy television series written by Im Young-bin, directed by Choi Jung-in, and starring Seo Kang-joon, Jin Ki-joo, and Kim Shin-rok. The series depicts a man who is an NIS agent goes undercover as a high school student. It aired on MBC TV from February 21, to March 29, 2025, every Friday and Saturday at 21:50 (KST). It is also available for streaming on TVING and Wavve in South Korea, and on Viu, Kocowa and Viki in selected regions.

Infobox

Hangul
언더커버 하이스쿨
RR
Eondeokeobeo haiseukul
MR
Ŏndŏk'ŏbŏ haisŭk'ul
Genre
mw- Action comedy Spy
Written by
Im Young-bin [ko]
Directed by
Choi Jung-in
Starring
Seo Kang-joon Jin Ki-joo Kim Shin-rok
Music by
Park Se-joon
Country of origin
South Korea
Original language
Korean
No. of episodes
12
Executive producers
Lee Hyang-bong Bae Ik-hyun Ahn Chang-ho Seo Young-rok Jo Young-jae Jung Yeon-ji
Producer
Lee Wol-yeon
Cinematography
Kim Sung-han Jo Min-chul
Editors
Kim Mi-kyung Kim Min-ji
Running time
70 minutes
Production companies
Neo Entertainment Slingshot Studio
Network
MBC TV
Release
February 21 (2025-02-21) –March 29, 2025 (2025-03-29)

Tables

1
1
Season
1
Season
2
Episode number
3
Episode number
4
Episode number
5
Episode number
6
Episode number
7
Episode number
8
Episode number
9
Episode number
10
Episode number
11
Episode number
12
Season
Episode number
Average
1
2
3
4
5
6
7
8
9
10
11
12
1
1.099
1.311
1.199
1.537
1.387
1.386
1.312
1.239
1.153
1.044
1.156
1.142
1.247
Average TV viewership ratings · Viewership
Nationwide
Nationwide
Ep.
Nationwide
Original broadcast date
Seoul
1
1
Ep.
1
Original broadcast date
February 21, 2025
Average audience share(Nielsen Korea)
5.6% (12th)
Average audience share(Nielsen Korea)
5.8% (9th)
2
2
Ep.
2
Original broadcast date
February 22, 2025
Average audience share(Nielsen Korea)
6.6% (5th)
Average audience share(Nielsen Korea)
6.5% (4th)
3
3
Ep.
3
Original broadcast date
February 28, 2025
Average audience share(Nielsen Korea)
6.6% (9th)
Average audience share(Nielsen Korea)
6.7% (6th)
4
4
Ep.
4
Original broadcast date
March 1, 2025
Average audience share(Nielsen Korea)
8.3% (3rd)
Average audience share(Nielsen Korea)
8.3% (3rd)
5
5
Ep.
5
Original broadcast date
March 7, 2025
Average audience share(Nielsen Korea)
7.2% (6th)
Average audience share(Nielsen Korea)
7.0% (6th)
6
6
Ep.
6
Original broadcast date
March 8, 2025
Average audience share(Nielsen Korea)
6.7% (3rd)
Average audience share(Nielsen Korea)
7.1% (3rd)
7
7
Ep.
7
Original broadcast date
March 14, 2025
Average audience share(Nielsen Korea)
6.8% (6th)
Average audience share(Nielsen Korea)
6.3% (8th)
8
8
Ep.
8
Original broadcast date
March 15, 2025
Average audience share(Nielsen Korea)
6.1% (4th)
Average audience share(Nielsen Korea)
6.1% (3rd)
9
9
Ep.
9
Original broadcast date
March 21, 2025
Average audience share(Nielsen Korea)
6.1% (7th)
Average audience share(Nielsen Korea)
5.8% (8th)
10
10
Ep.
10
Original broadcast date
March 22, 2025
Average audience share(Nielsen Korea)
5.4% (5th)
Average audience share(Nielsen Korea)
5.3% (5th)
11
11
Ep.
11
Original broadcast date
March 28, 2025
Average audience share(Nielsen Korea)
6.0% (6th)
Average audience share(Nielsen Korea)
6.3% (7th)
12
12
Ep.
12
Original broadcast date
March 29, 2025
Average audience share(Nielsen Korea)
5.8% (4th)
Average audience share(Nielsen Korea)
5.8% (4th)
Average
Average
Ep.
Average
Original broadcast date
6.4%
Average audience share(Nielsen Korea)
6.4%
In the table above, the blue numbers represent the lowest ratings and the red numbers represent the highest ratings.
In the table above, the blue numbers represent the lowest ratings and the red numbers represent the highest ratings.
Ep.
In the table above, the blue numbers represent the lowest ratings and the red numbers represent the highest ratings.
Ep.
Original broadcast date
Average audience share(Nielsen Korea)
Nationwide
Seoul
1
February 21, 2025
5.6% (12th)
5.8% (9th)
2
February 22, 2025
6.6% (5th)
6.5% (4th)
3
February 28, 2025
6.6% (9th)
6.7% (6th)
4
March 1, 2025
8.3% (3rd)
8.3% (3rd)
5
March 7, 2025
7.2% (6th)
7.0% (6th)
6
March 8, 2025
6.7% (3rd)
7.1% (3rd)
7
March 14, 2025
6.8% (6th)
6.3% (8th)
8
March 15, 2025
6.1% (4th)
6.1% (3rd)
9
March 21, 2025
6.1% (7th)
5.8% (8th)
10
March 22, 2025
5.4% (5th)
5.3% (5th)
11
March 28, 2025
6.0% (6th)
6.3% (7th)
12
March 29, 2025
5.8% (4th)
5.8% (4th)
Average
6.4%
6.4%
In the table above, the blue numbers represent the lowest ratings and the red numbers represent the highest ratings.

References

  1. Undercover High School
  2. iMBC
    https://program.imbc.com/Concept/UndercoverHighschool
  3. WelCon
    https://welcon.kocca.kr/en/directory/content/undercover-high-school--8335
  4. Osen
    https://m.entertain.naver.com/article/109/0005094635
  5. Sports World
    https://www.sportsworldi.com/newsView/20250315503113
  6. News1
    https://m.entertain.naver.com/article/421/0007607006
  7. News1
    https://www.news1.kr/entertain/broadcast-tv/5713045
  8. Star News
    https://m.entertain.naver.com/article/108/0003246763
  9. Ten Asia
    https://tenasia.hankyung.com/article/2025010686994
  10. Newsen
    https://www.newsen.com/news_view.php?uid=202501070805262410
  11. Ilgan Sports
    https://m.entertain.naver.com/article/241/0003378808
  12. Herald Pop
    https://www.heraldpop.com/article/10383351
  13. Sports Today
    http://www.stoo.com/article.php?aid=98828581045
  14. Ten Asia
    https://m.entertain.naver.com/article/312/0000688850
  15. Osen
    http://www.osen.co.kr/article/G1112485610
  16. iMBC
    https://program.imbc.com/Cast/UndercoverHighschool
  17. Osen
    http://www.osen.co.kr/article/G1112476965
  18. Star News
    https://www.starnewskorea.com/stview.php?no=2025021910005356761
  19. Ilgan Sports
    https://isplus.com/article/view/isp202501080024
  20. Sports Kyunghyang
    https://sports.khan.co.kr/article/202502140900003?pt=nv
  21. Osen
    http://www.osen.co.kr/article/G1112484295
  22. Newsen
    https://www.newsen.com/news_view.php?uid=202412031104090310
  23. Xports News
    https://www.xportsnews.com/article/1957337
  24. iMBC
    https://m.entertain.naver.com/article/408/0000226058
  25. JTBC
    https://m.entertain.naver.com/article/437/0000382552
  26. The Fact
    https://m.entertain.naver.com/article/629/0000271660
  27. JTBC
    https://m.entertain.naver.com/article/437/0000393932
  28. Osen
    https://m.entertain.naver.com/article/109/0005082029
  29. Yonhap News Agency
    https://en.yna.co.kr/view/AEN20240610007200315
  30. Sports Chosun
    https://m.entertain.naver.com/article/076/0004154816
  31. Ten Asia
    https://m.entertain.naver.com/article/312/0000668328
  32. Newsen
    https://newsen.com/news_view.php?uid=202501160807412410
  33. Top Star News
    https://www.topstarnews.net/news/articleView.html?idxno=15605755
  34. Viu
    https://www.viu.com/ott/id/articles/sinopsis-undercover-high-school/
  35. "Get ready for some serious chemistry! 💕 Undercover #SeoKangJun and teacher #JinKiJoo are about to make high school the most exciting place on earth! Watch the premiere of #UndercoverHighSchool on KOCOWA+ February 21!"
    https://x.com/kocowa_official/status/1890853633765339354
  36. Undercover High School
    https://www.prestigeonline.com/my/lifestyle/culture-plus-entertainment/undercover-high-school-k-drama-complete-episode-release-schedule/
  37. Nielsen Korea
    https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=1_1&area=00&begin_date=20250221
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