Season 1

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  8.1/1060 votes

  Forewarned Murder

  Season 1 Episode 1 - Aired 5/4/2018

  A man named "M" invites seven people to a murder game party. Among the eight in the room, one will become a victim, and another the culprit.

  Director: N/A

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  8.1/1051 votes

  Treasure Island

  Season 1 Episode 2 - Aired 5/4/2018

  Recognized for their performance, the detectives report to Jeju Island, where their first client asks them to participate in a treasure hunt.

  Director: N/A

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  7.7/1049 votes

  Kwang-soo, a Murderer

  Season 1 Episode 3 - Aired 5/11/2018

  While enjoying their break on Jeju Island, the detectives get a shocking call from K, who says Kwang-soo is a prime murder suspect and is on the run.

  Director: N/A

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  8.1/1044 votes

  Messages from the Dead

  Season 1 Episode 4 - Aired 5/11/2018

  Jong-min comes across a diary of a dead teen girl who was possibly murdered. To find the truth, he gathers the detectives at the school she attended.

  Director: N/A

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  8.2/1047 votes

  The Last Vampire

  Season 1 Episode 5 - Aired 5/18/2018

  A woman turns up dead on an island off the coast of Incheon. The detectives learn that a centuries-old legend of a vampire has haunted the islanders.

  Director: N/A

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  8.8/1052 votes

  Battle of the Detectives

  Season 1 Episode 6 - Aired 5/18/2018

  To find the missing self-portrait of a recently deceased painter, two rival curators at a Seoul art museum each commission a team of detectives.

  Director: N/A

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  8.2/1039 votes

  The Vanished Magician

  Season 1 Episode 7 - Aired 5/25/2018

  Without any cases to solve, the detectives enjoy watching a magic show rehearsal -- until the show's star magician suddenly disappears without a trace.

  Director: N/A

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  8.6/1037 votes

  The Mysterious Gentleman

  Season 1 Episode 8 - Aired 5/25/2018

  A man who introduces himself as K's old friend offers the detectives lavish pay and a chance to partake in a special mission -- but there's a catch.

  Director: N/A

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  8.4/1030 votes

  Operation: Criminal Transport

  Season 1 Episode 9 - Aired 6/1/2018

  A culprit asks specifically for the detectives to escort him to the police station. In exchange, he promises to tell them everything they want to know.

  Director: N/A

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  8.6/1031 votes

  The Disappearance of K

  Season 1 Episode 10 - Aired 6/1/2018

  The detectives receive a text message from K that was written three months ago. It asks them to come to Incheon, where their final test awaits.

  Director: N/A

  Writer: N/A