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.
Through the Darkness (Season 1)
Red Cap Incident (Episode 1) 9.0
Writer: Seol Yi-na
Air date: 2022-01-14
Runtime: 68 min
Overview: Song Ha-yeong pursues a criminal known for targeting young women. Kook Yeong-su looks to form a team of criminal behavioral analysts.
Habits of Criminals (Episode 2) 9.0
Writer: Seol Yi-na
Air date: 2022-01-15
Runtime: 67 min
Overview: 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.
Ha-yeong Meets Tae-gu Again (Episode 3) 9.0
Writer: Seol Yi-na
Air date: 2022-01-21
Runtime: 70 min
Overview: The grisly murder of a child catches the attention of Ha-yeong and Yeong-su. A determined police captain clashes with the team.
What Must We Remember? (Episode 4) 10.0
Writer: Seol Yi-na
Air date: 2022-01-22
Runtime: 65 min
Overview: When a suspect’s home is searched, the police make a gruesome discovery. Ha-yeong and Yeong-su grow frustrated as the investigation continues.
Looking into the Minds of Evil (Episode 5) 10.0
Writer: Seol Yi-na
Air date: 2022-01-28
Runtime: 68 min
Overview: 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.
The Man With the Hiking Boots (Episode 6) 10.0
Writer: Seol Yi-na
Air date: 2022-01-29
Runtime: 66 min
Overview: 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.
A Scary Wolf Inside the Rabbit Burrow (Episode 7) 10.0
Writer: Seol Yi-na
Air date: 2022-02-25
Runtime: 71 min
Overview: Ha-yeong spends time with his mother on his birthday. With two killers on the loose, the investigators are faced with high-pressure stakes.
There Are No Perfect Crimes (Episode 8) 10.0
Writer: Seol Yi-na
Air date: 2022-02-26
Runtime: 65 min
Overview: 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.
Becoming the Monster (Episode 9) 10.0
Writer: Seol Yi-na
Air date: 2022-03-04
Runtime: 66 min
Overview: 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.
I Just Liked It (Episode 10) 10.0
Writer: Seol Yi-na
Air date: 2022-03-05
Runtime: 67 min
Overview: During interviews and crime scene reenactments, Ha-yeong and the police dive deep into a ruthless suspect's psyche and past trauma.
The Victims And Their Families (Episode 11) 10.0
Writer: Seol Yi-na
Air date: 2022-03-11
Runtime: 73 min
Overview: 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.
The Hearts of Criminals (Episode 12) 10.0
Writer: Seol Yi-na
Air date: 2022-03-12
Runtime: 68 min
Overview: Police and the analysis team investigate a murder suspect who is known for charming women and luring them into his car.
Seasons
Episodes 12