Undercover High School: Season 1
Episode Guide
Season 1 Progress Shield
The Emperor's Lost Gold
Feb 21, 2025 · 71 min
After 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 almost hard to
Spooky Stories
Feb 22, 2025 · 67 min
Hae-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 Soo-ah, his sh
Ghost Story Riddles
Feb 28, 2025 · 69 min
Hae-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 connection, she ke
Joining the Student Council
Mar 1, 2025 · 66 min
Hae-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 name vindica
Student Council
Mar 7, 2025 · 68 min
Hae 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 gains a spot in
Hye Seong's Father's Notebook
Mar 8, 2025 · 70 min
The 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 pushes him
The 24th Anniversary of Byeongmun High School
Mar 14, 2025 · 65 min
Hae 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 emotional turm
The Plan for VIP Students
Mar 15, 2025 · 70 min
After 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 integrity. Meanwhil
The Mathematics Teacher
Mar 21, 2025 · 68 min
As 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 Seong detects h
Retribution
Mar 22, 2025 · 67 min
To 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 to back dow
The Devastating Truth
Mar 28, 2025 · 68 min
The 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 father's remains.
Where The Stars Lead
Mar 29, 2025 · 69 min
Despite 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 voice recordin