Season
- Season 1 2015-06-22
Episode
- Episode 1: Every Child's Story Begins with Their Parents
- Episode 2: Hello, Monster
- Episode 3: Thou Shall Not Kill, But...
- Episode 4: The Suspect, Lee Hyun
- Episode 5: Borne Back Ceaselessly into the Past
- Episode 6: The Blood of a Murderer
- Episode 7: Let's Be Partners?
- Episode 8: Remember Me
- Episode 9: Stalker S
- Episode 10: Find Me
- Episode 11: Birth of a Monster
- Episode 12: If I Had to Kill Somebody...
- Episode 13: What Choice Would You Make?
- Episode 14: Lee Joon-young's Room
- Episode 15: Is a Happy Ending Possible?
- Episode 16: I Remember You
Hello Monster
A top detective is reunited with a childhood friend who has since become a leading criminal profiler. Can they join forces to stop a serial killer?
