Seo In-guk
Lee Hyun
TV Series2015MysteryDrama
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?
7.3 / 10201560 min130 votes
Play official trailerCast
Cast
Jang Na-ra
Cha Ji-an
Park Bo-gum
Jung Sun-ho/Lee Min
Lee Chun-hee
Kang Eun-hyuk
Choi Won-young
Lee Joon-ho/Lee Joon-yeong
Im Ji-eun
Hyun Ji-soo
Min Sung-wook
Son Myung-woo
Kim Jae-young
Min Seung-Joo
Jun Kwang-ryul
Lee Joong-Min
Son Seung-won
Choi Eun-Bok
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