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?
Hello Monster (2015) is a mystery and drama series that premiered on June 22, 2015, spanning 1 season and 16 episodes. It stars Seo In-guk, Jang Na-ra, Park Bo-gum and Lee Chun-hee. Viewers rate it 7.3 out of 10 across 128 ratings.
Watch the official trailer for Hello Monster before you start streaming.
Official trailers, teasers, clips and featurettes for Hello Monster.
Teaser
Teaser
Seo In-guk
as Lee Hyun
Jang Na-ra
as Cha Ji-an
Park Bo-gum
as Jung Sun-ho/Lee Min
Lee Chun-hee
as Kang Eun-hyuk
Choi Won-young
as Lee Joon-ho/Lee Joon-yeong
Im Ji-eun
as Hyun Ji-soo
Min Sung-wook
as Son Myung-woo
Kim Jae-young
as Min Seung-Joo
Jun Kwang-ryul
as Lee Joong-Min
Son Seung-won
as Choi Eun-Bok
Average viewer score of 7.3/10 from 128 ratings.
Aside from the weak introduction, the first episode also had loads of exhibitions of the ML smarts through the typical genius character stereotype, however, the drama proceeded to treat the viewers like idiots for the remainder of the drama. Initially, Detective Cha Ji An, and most of the police force, were physically capable and adequate enough, however, they suddenly became as effective and incompetent as useless…
Reviewed on April 5, 2024
I enjoyed the mystery and the actors were great, but I didn't care for the storypart with the crazy old man in prison, so I skipped that most of the time. Other than that I had a good time and Seo In-Guk is always a good reason to tune in.
Reviewed on May 12, 2026
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Hello Monster (2015) does not have a confirmed streaming service listed for your region yet. Availability is refreshed regularly, so check back for updates.
Hello Monster has 1 season and 16 episodes in total, starting from its premiere on June 22, 2015.
No. Hello Monster is marked as ended, with the final episode airing on August 11, 2015.
Hello Monster (2015) stars Seo In-guk, Jang Na-ra, Park Bo-gum, Lee Chun-hee and Choi Won-young. The full cast list with character names is available in the cast section of this page.
Hello Monster (2015) is rated 7.3 out of 10 from 128 viewer votes, and suits viewers who like mystery and drama series. Reviews from viewers are collected further down this page.
The official Hello Monster trailer is embedded in the trailer section of this page and plays instantly in your browser.
