S01E011:11:061. The Emperor's Lost GoldAfter a botched operation puts Hae-sung and his team in serious jeopardy, the only way for him to salvage his career at the NIS is to accept an assignment that seems…Episodes — Season 1
Season pageS01E011:11:061. The Emperor's Lost GoldAfter a botched operation puts Hae-sung and his team in serious jeopardy, the only way for him to salvage his career at the NIS is to accept an assignment that seems…
S01E021:07:002. Spooky StoriesHae-sung comes dangerously close to blowing his cover while searching for the hidden gold in Byeongmun High School's eerie old building, barely escaping detection by…
S01E031:09:263. Ghost Story RiddlesHae-sung uncovers a crucial clue hidden within the old building, but Chairwoman Seo quickly learns its potential connection to the elusive gold bars. Sensing the…
S01E041:06:174. Joining the Student CouncilHae-sung attends the anti-bullying committee session with a key witness who clears his name, while Dong-min finally finds the courage to stand up for himself. With his…
S01E051:08:195. Student CouncilHae Seong and the team grow increasingly concerned that Su A's suspicions could threaten his undercover mission. However, Hae Seong defies the odds and successfully…
S01E061:10:336. Hye Seong's Father's NotebookThe school's security guard dies, leaving Hae Seong a notebook belonging to his missing father. The revelation is shocking, and he storms the NIS for answers. The answer…
S01E071:05:517. The 24th Anniversary of Byeongmun High SchoolHae Seong is caught off guard when he recognises Su A's childhood name, Bong Ja, which stirs memories of his first love and distracts him from his focus. Despite the…
S01E081:10:428. The Plan for VIP StudentsAfter uncovering the possibility of a mole within the NIS, Hae Seong becomes increasingly distrustful of those around him, causing him to question the mission's…
S01E091:08:169. The Mathematics TeacherAs Su A recovers in the hospital following the attack during the break-in, Hae Seong and the team uncover the culprit: Lee Jun Ho, the mathematics teacher. When Hae…
S01E101:07:5310. RetributionTo everyone's shock, Seo Myeong Ju returns to the school. Unimpressed by Hae Seong, she expels him and demonstrates her power by dismantling his team. However, refusing…
S01E111:08:2711. The Devastating TruthThe gold bars vanish just as they are within reach, and Seo Myeong Ju suspects Hae Seong has them. In the vault, Hae Seong makes a heartbreaking discovery of his…
S01E121:09:1712. Where The Stars LeadDespite getting badly injured, Hae Seong manages to call Su A and his team. They conclude that the only evidence they can secure is the flash drive that contains the…Where to stream Undercover High School
Subscription
Rakuten Viki
OnDemandKorea
Kocowa Amazon Channel
Kocowa
Rakuten VikiOnDemandKoreaKocowa Amazon ChannelKocowaFree with adsRakuten Viki
Rakuten VikiAvailability provided by JustWatch via TMDB, details on TMDB. Offers in the United States, subject to change.
Undercover High School synopsis
Ace NIS agent Jung Hae-seong is demoted after a mission failure. He goes undercover at a high school to locate King Gojong's missing gold, meeting his teacher Oh Soo-ah, who sees him as her lost first love, stirring old heartbreak.
Undercover High School cast
Seo Kang-joonJeong Hae-sung · 12 ep.
Jin Ki-jooOh Su-ah · 12 ep.
Kim Shin-rockSeo Myung-ju · 12 ep.
Kim Min-juLee Ye-na · 12 ep.
Yoon Ga-iPark Mi-jung · 12 ep.
Kim Young-ahIm Chung-ha · 12 ep.
Lee Hyun SoHan Seung-jae · 12 ep.
Yun Chae-binYun Chae-rin · 12 ep.
Kim Sun-minJi Hyeon-jun · 12 ep.
Kim Seung-beomKim Ho-jin · 12 ep.
Kang Pil-junSon Beom-Sik · 12 ep.
Su Hyun[Student] · 1 ep.Undercover High School trailer
About the series Undercover High School
Undercover High School is a series (action & adventure and comedy) created by Im Young-bin and Choi Jeong-in, airing on MBC since 2025. It has 1 season and 12 episodes of about 70 minutes each. The series ended on March 29, 2025. Cast members include Seo Kang-joon, Jin Ki-joo and Kim Shin-rock. It is rated 8.0/10 by 65 TMDB users.
Frequently asked questions about Undercover High School
Where to watch Undercover High School online?
In the United States, Undercover High School is available with a subscription on Rakuten Viki, OnDemandKorea and Kocowa Amazon Channel, for free with ads on Rakuten Viki (source: JustWatch via TMDB, offers subject to change). Each episode has its own page with this information.
How many seasons of Undercover High School are there?
Undercover High School has 1 season for a total of 12 episodes.
Has Undercover High School ended?
Yes, the series has ended: the last episode aired on March 29, 2025.
Who stars in Undercover High School?
The lead actors are Seo Kang-joon (Jeong Hae-sung), Jin Ki-joo (Oh Su-ah), Kim Shin-rock (Seo Myung-ju), Kim Min-ju (Lee Ye-na), Yoon Ga-i (Park Mi-jung).
