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.

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  E1Red Cap Incident

  Jan 14, 2022· 68m

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

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  E2Habits of Criminals

  Jan 15, 2022· 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.

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  E3Ha-yeong Meets Tae-gu Again

  Jan 21, 2022· 70m

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

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  E4What Must We Remember?

  Jan 22, 2022· 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.

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  E5Looking into the Minds of Evil

  Jan 28, 2022· 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.

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  E6The Man With the Hiking Boots

  Jan 29, 2022· 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.

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  E7A Scary Wolf Inside the Rabbit Burrow

  Feb 25, 2022· 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.

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  E8There Are No Perfect Crimes

  Feb 26, 2022· 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.

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  E9Becoming the Monster

  Mar 4, 2022· 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.

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  E10I Just Liked It

  Mar 5, 2022· 67m

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

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  E11The Victims And Their Families

  Mar 11, 2022· 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.

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  E12The Hearts of CriminalsFinale

  Mar 12, 2022· 68m

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