Through the Darkness - Season 1

First aired: 1/14/2022 12 episodes

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.

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Episodes

1. Red Cap Incident

Aired: 1/14/2022

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

2. Habits of Criminals

Aired: 1/15/2022

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. Ha-yeong Meets Tae-gu Again

Aired: 1/21/2022

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

4. What Must We Remember?

Aired: 1/22/2022

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. Looking into the Minds of Evil

Aired: 1/28/2022

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. The Man With the Hiking Boots

Aired: 1/29/2022

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. A Scary Wolf Inside the Rabbit Burrow

Aired: 2/25/2022

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. There Are No Perfect Crimes

Aired: 2/26/2022

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. Becoming the Monster

Aired: 3/4/2022

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. I Just Liked It

Aired: 3/5/2022

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

11. The Victims And Their Families

Aired: 3/11/2022

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. The Hearts of Criminals

Aired: 3/12/2022

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