Season 1
16 episodes · first aired 2021-08-09
| Still | # | Title | Overview | Air date | Rating |
|---|---|---|---|---|---|
 | 01 | Just Another Meaningless Day 2021-08-09 | Yoo Dong-man goes undercover to root out illegal gambling. Kang Sun-ho steals money from criminals to pay for his father’s cancer treatment. | 2021-08-09 | 9.0 |
 | 02 | Sun-ho Meets Dong-man Again 2021-08-10 | Oh Kang-hui witnesses her mom’s arrest. When training begins at the university, Dong-man appoints Sun-ho a leader, set on flunking him. | 2021-08-10 | 8.0 |
 | 03 | Nothing Is Impossible 2021-08-16 | Determined to bring victory to his team, Sun-ho asks Dong-man for advice. The final assignment comes with a twist. | 2021-08-16 | 9.0 |
 | 04 | No Hard Evidence 2021-08-17 | Sun-ho gets grilled in class. Kang-hui’s personal life is made public on the school website. Dong-man feels out the police chief. | 2021-08-17 | 0.0 |
 | 05 | The Duo 2021-08-23 | Dong-man grows suspicious of a fellow professor. With Sun-ho by his side, he scopes out the scene of the crime to check out an alibi. | 2021-08-23 | 0.0 |
 | 06 | The Blackout 2021-08-24 | Another potential culprit appears on Dong-man’s radar. Sun-ho struggles to remember the events of the night before. The campus hosts a field day. | 2021-08-24 | 0.0 |
 | 07 | The Disappointment 2021-08-30 | Sun-ho finds Park Cheol-jin suspect, but Dong-man is determined to keep him off the watch list. Kang-hui attends her mom's trial. | 2021-08-30 | 0.0 |
 | 08 | The Culprit 2021-08-31 | Cheol-jin finds himself in an even deeper rut when he's cornered by Sun-ho and Dong-man. A cheating scandal breaks out during the final exams. | 2021-08-31 | 0.0 |
 | 09 | The Confession 2021-09-06 | Cheol-jin falls into a trap. Dong-man takes a closer look into Ko Deok-bae’s business. Kang-hui insists on joining Sun-ho in the investigation. | 2021-09-06 | 0.0 |
 | 10 | Sun-ho’s Investigation Team 2021-09-07 | Sun-ho and his friends track the location of the burner phone. The professors step in to protect their students from further danger. | 2021-09-07 | 0.0 |
 | 11 | The Case Closed 2021-09-13 | Sun-ho gets Kang-hui a gift, but hesitates to give it to her. A critical piece of evidence is missing. Dong-man spots a colleague at the precinct. | 2021-09-13 | 0.0 |
 | 12 | The Enemy Within 2021-09-14 | Sun-ho’s criminal history comes back to haunt him. Learning of Choi Hui-su’s connections to the case, Dong-man leans on his gut and tails her. | 2021-09-14 | 0.0 |
 | 13 | Sun-ho’s Counterattack 2021-09-27 | Sun-ho acquires a key to a safe, Kang-hui calls it quits and Dong-man gets eyes on the chief. Stronger curfews and regulations are enforced on campus. | 2021-09-27 | 0.0 |
 | 14 | The Ledger 2021-09-28 | With his hands on the ledger, Dong-man is sure that he's pinned down the culprit. Sun-ho gets arrested for conspiring with Jang Jae-gyu. | 2021-09-28 | 7.0 |
 | 15 | The Head Operator Of The Zelkov 2021-10-04 | The police look for incriminating evidence against Han Jeong-sik. The truth behind the foundation finally comes to light. | 2021-10-04 | 0.0 |
 | 16 | The Hacker Sun-ho 2021-10-05 | Sun-ho completes one final hacking job before dropping out of school. He turns himself in for his past crimes so he can return with a clean slate. | 2021-10-05 | 0.0 |
Ratings shown are community scores. Once OMDB is wired, these become per-episode IMDB values.