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Episodes
Cast
Yoo Jae-suk
Yoo Jae-suk
Park Min-young
Park Min-Young
Sehun
Oh Sehun
Kim Se-jeong
Kim Se-jeong
Lee Kwang-soo
Lee Kwang-soo
Lee Seung-gi
Lee Seung-gi
Kim Jong-min
Kim Jong-min
1Forewarned Murder
May 4, 201898 min
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.
2Treasure Island
May 4, 201884 min
Recognized for their performance, the detectives report to Jeju Island, where their first client asks them to participate in a treasure hunt.
3Kwang-soo, a Murderer
May 11, 201877 min
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.
4Messages from the Dead
May 11, 201875 min
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.
5The Last Vampire
May 18, 201886 min
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.
6Battle of the Detectives
May 18, 201886 min
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.
7The Vanished Magician
May 25, 201886 min
Without any cases to solve, the detectives enjoy watching a magic show rehearsal -- until the show's star magician suddenly disappears without a trace.
8The Mysterious Gentleman
May 25, 201886 min
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.
9Operation: Criminal Transport
Jun 1, 201883 min
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.
10The Disappearance of K
Jun 1, 201878 min
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.