

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.
Crime, Drama • Series • 2022 • 1 season
Starring: Kim Nam-gil, Kim So-jin, Jin Sun-kyu
Created by: Kim Mi-joo, Lee Seul-gi

S1 E1 - Red Cap Incident
Song Ha-yeong pursues a criminal known for targeting young women. Kook Yeong-su looks to form a team of criminal behavioral analysts.
Jan 14, 2022 • 1h 8m

S1 E2 - Habits of Criminals
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.
Jan 15, 2022 • 1h 7m

S1 E3 - Ha-yeong Meets Tae-gu Again
The grisly murder of a child catches the attention of Ha-yeong and Yeong-su. A determined police captain clashes with the team.
Jan 21, 2022 • 1h 10m

S1 E4 - What Must We Remember?
When a suspect’s home is searched, the police make a gruesome discovery. Ha-yeong and Yeong-su grow frustrated as the investigation continues.
Jan 22, 2022 • 1h 5m

S1 E5 - Looking into the Minds of Evil
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.
Jan 28, 2022 • 1h 8m

S1 E6 - The Man With the Hiking Boots
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.
Jan 29, 2022 • 1h 6m

S1 E7 - A Scary Wolf Inside the Rabbit Burrow
Ha-yeong spends time with his mother on his birthday. With two killers on the loose, the investigators are faced with high-pressure stakes.
Feb 25, 2022 • 1h 11m

S1 E8 - There Are No Perfect Crimes
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.
Feb 26, 2022 • 1h 5m

S1 E9 - Becoming the Monster
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.
Mar 4, 2022 • 1h 6m

S1 E10 - I Just Liked It
During interviews and crime scene reenactments, Ha-yeong and the police dive deep into a ruthless suspect's psyche and past trauma.
Mar 5, 2022 • 1h 7m

S1 E11 - The Victims And Their Families
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.
Mar 11, 2022 • 1h 13m

S1 E12 - The Hearts of Criminals
Police and the analysis team investigate a murder suspect who is known for charming women and luring them into his car.
Mar 12, 2022 • 1h 8m
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Through the Darkness
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.
Crime, Drama • TV Series • 2022