Through the Darkness — 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.
01 Red Cap Incident
Jan 14, 20221h 8m★ 9.0
Song Ha-yeong pursues a criminal known for targeting young women. Kook Yeong-su looks to form a team of criminal behavioral analysts.
02 Habits of Criminals
Jan 15, 20221h 7m★ 9.0
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.
03 Ha-yeong Meets Tae-gu Again
Jan 21, 20221h 10m★ 9.0
The grisly murder of a child catches the attention of Ha-yeong and Yeong-su. A determined police captain clashes with the team.
04 What Must We Remember?
Jan 22, 20221h 5m★ 10.0
When a suspect’s home is searched, the police make a gruesome discovery. Ha-yeong and Yeong-su grow frustrated as the investigation continues.
05 Looking into the Minds of Evil
Jan 28, 20221h 8m★ 10.0
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.
06 The Man With the Hiking Boots
Jan 29, 20221h 6m★ 10.0
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.
07 A Scary Wolf Inside the Rabbit Burrow
Feb 25, 20221h 11m★ 10.0
Ha-yeong spends time with his mother on his birthday. With two killers on the loose, the investigators are faced with high-pressure stakes.
08 There Are No Perfect Crimes
Feb 26, 20221h 5m★ 10.0
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.
09 Becoming the Monster
Mar 4, 20221h 6m★ 10.0
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
Mar 5, 20221h 7m★ 10.0
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
Mar 11, 20221h 13m★ 10.0
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
Mar 12, 20221h 8m★ 10.0
Police and the analysis team investigate a murder suspect who is known for charming women and luring them into his car.