Season 1

A team of tenacious detectives study the minds of murderers at a time when Korea's first serial murders terrorized the nation. Based on true events.

1. 

   1. Red Cap Incident

   2022-01-14 · 68m

   Song Ha-yeong pursues a criminal known for targeting young women. Kook Yeong-su looks to form a team of criminal behavioral analysts.

2. 

   2. Habits of Criminals

   2022-01-15 · 67m

   Ha-yeong consults a criminal to understand a killer’s motives. An arrest leads to a startling interrogation session and a break in the case.

3. 

   3. Ha-yeong Meets Tae-gu Again

   2022-01-21 · 70m

   The grisly murder of a child catches the attention of Ha-yeong and Yeong-su. A determined police captain clashes with the team.

4. 

   4. What Must We Remember?

   2022-01-22 · 65m

   When a suspect’s home is searched, the police make a gruesome discovery. Ha-yeong and Yeong-su grow frustrated as the investigation continues.

5. 

   5. Looking into the Minds of Evil

   2022-01-28 · 68m

   A crooked new police chief causes trouble for the team. The deaths of a professor and his wife touch off a series of brutal murders.

6. 

   6. The Man With the Hiking Boots

   2022-01-29 · 66m

   Yoon Tae-gu and Kim Bong-sik seek to set boundaries on the behavioral analysis team. A complex investigation sends the police down a twisted path.

7. 

   7. A Scary Wolf Inside the Rabbit Burrow

   2022-02-25 · 71m

   Ha-yeong spends time with his mother on his birthday. With two killers on the loose, the investigators are faced with high-pressure stakes.

8. 

   8. There Are No Perfect Crimes

   2022-02-26 · 65m

   A chase takes a risky turn. When a suspect asks for a high-ranking officer, Ha-yeong hatches a plan. A search for victims' bodies continues.

9. 

   9. Becoming the Monster

   2022-03-04 · 66m

   The behavioral analysis team agrees to an interview with a journalist. Ha-yeong seeks to enter the killer’s mind, but it takes a toll on him.

10. 

    10. I Just Liked It

    2022-03-05 · 67m

    During interviews and crime scene reenactments, Ha-yeong and the police dive deep into a ruthless suspect's psyche and past trauma.

11. 

    11. The Victims And Their Families

    2022-03-11 · 73m

    A horrific accident forces Ha-yeong to reflect on the mental impact of his work. Meanwhile, two people go missing from a karaoke bar, raising suspicions.

12. 

    12. The Hearts of Criminals

    2022-03-12 · 68m

    Police and the analysis team investigate a murder suspect who is known for charming women and luring them into his car.