Inspector Koo (2021) poster
Your Rating: 0/10
Ratings: 8.2/10 from 6,068 users
# of Watchers: 15,295
Reviews: 44 users
Ranked #1621
Popularity #1051
Watchers 6,068

A hard-boiled investigative comedy drama that centers around the insurance investigator Koo Kyung Yi who investigates a murder case. Koo Kyung Yi, an intelligent woman who solves cold cases for the thrill of cracking the case rather than bringing justice to the world. By hook or by crook, she ferociously chases the truth behind every case. A college student who is a serial killer plots an accidental murder case to defraud her insurance money. (Source: Soompi) Edit Translation

  • English
  • 한국어
  • 中文(台灣)
  • 中文(简体)
  • Country: South Korea
  • Type: Drama
  • Episodes: 12
  • Aired: Oct 30, 2021 - Dec 12, 2021
  • Aired On: Saturday, Sunday
  • Original Network: jTBC Netflix
  • Duration: 1 hr. 10 min.
  • Score: 8.2 (scored by 6,068 users)
  • Ranked: #1621
  • Popularity: #1051
  • Content Rating: 15+ - Teens 15 or older

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Cast & Credits


64 people found this review helpful
Dec 12, 2021
12 of 12 episodes seen
Completed 3
Overall 8.5
Story 9.0
Acting/Cast 9.0
Music 10
Rewatch Value 9.0

Real definition of "Dark Comedy".

This is exactly what you call dark comedy or black humor; perfect combination of comedy elements & morbid satire. Inspector Koo, in my opinion, is also the investigative thriller of the year 2021 and I am amazed to see an immense investigative drama after a long while.

Inspector Koo (구경이) got a simple yet "not so basic" storyline. The title clearly indicates about the drama being centered by single person, i.e. Inspector Koo Kyung Yi. She's an ex-cop who now works as an insurance investigator at a company after retiring from police due to a tragic incident involving her personal life. Her desire to perceive truth behind different cases is so high that she can do literally anything to get her work done. She ferociously chases down a university girl, who seems to have been connected to a serial murder case, all of them staged as either suicide or accicent.

The drama has 3 stages in total:
i) know it all but no proof.
ii) have proof but can't catch.55
iii) oh! everything is a messs.

Koo Kyung Yi (Lee Young Ae) is a crazy woman; to say it in Korean, 'michin yeoja'. Food, alcohol and gaming are what she lives for, and can go insane when not provided with them. She got severe mental health issues due to past incidents, and can be sensitive when mentioned about them. Song Yi Kyung (Kim Hye Joon) is a university student with abnormal behaviours and considered a psychopath by many. She's a dramaclub member too and her past has made her like this. She avenges victims of several incidents who have been unfairly compensated by the law, by doing what? Killing the guilty. She's also know as Ms. K.

This drama infact is a all female story and is dominated by women all over; amazing actresses playing major characters. We have here, Chief Yong Sook (Kim Hae Sook) as the chairperson of a charity foundation. Na Je Hee (Kwak Sun Young) as the team leader of the investigative team B, Director Kim (Jung Suk Yong) as Chief Yong's right-hand man, Oh Kyung Soo (Jo Hyun Chul) as an investigator in the Team B, Santa (Baek Sung Chul) as Kyung Yi's assistant, Ahn Keon Wook (Lee Hong Nae) as K's helper, etc in the major roles. These are all profound actors, and hence the acting department has done very well in the drama.

The plot development is stupendously set up in the drama and the progression is very pleasing. The first impression from the 1st episode is sooo intriguing that you'll definitely move to the next without hesitation. This is something that'll keep you hooked throughout and never ran outta substances. There are places where you might feel like the consequences might be become uninteresting, but that's where the table turns and they start over again. That's the beauty of the drama. There are several peaks in this 12 episode script and I loved how they were able to keep the moods & vibes up till the very end of the show.

I don't want to believe that the writer is actually a rookie and it's their debut script as the main jakka. Sun Cho Yi jakkanim have done a great job such a mind blowing script with a compelling plus captivating progression. The character dynamics for each and every major character is very well drawn and everyone has got a fair share of importance, I feel. You're gonna love Koo Kyung Yi, Song Yi Kyung, Santa, etc. Special mention to the cute-acting namja Santa who'll melt your heart multiple times with his acts TT. There's also a portrayal of homosexuality (gay character) for one of the major roles (won't spoil) and I am happy they didn't use it in bad light.

Director Lim Jung Heum, known for the critically acclaimed thriller drama "Nobody Knows" did take the responsibility for Inspector Koo and was able to do a fabulous job there. This is clearly evidebt from the 1st episode of the show. Screenplay management, coordination, screen-editing pacing and execution is amazingly handled and the entire crew deserves credit for it too.

The sound production department as well as the composer for this drama Kim Tae Sung needs some serious praise. Loved how the drama has so many enraging OSTs that perfectly fit the mood of the drama and were appropriately used at instances. A major part of OST album is sung by TRPP, a Korean Indie trio, known for their rock, alternative and garage elements. The songs by TRPP are "Yeah (Round and Round)", "Coming After", "Sins", "Patience", "Liars (I feel Alive)" and "Limbo".The speciality of TRPP is that are the electronic instrumentals used in their songs plus their harmonic vocal line up, which is totally visible here.

Other than that we have "Up" by Hajin, "Watch Me" by SURL and "SURF" by INNI. Additionally TRPP has collaborated with Wayco and Mollo separately to remake Yeah (Round and Round). I swear to my life, there couldn't be any other song to accurately suit the drama and the mood it wanted to deliver. Music for Inspector Koo deserves 10/10.

The sense of choosing from right or wrong is the main concept of this drama. This drama reminded of this quote which I don't remember was said by the person, but it goes like, "Right is right even if no one is doing it; wrong is wrong even if everyone is doing it.". Everyone who has their standards to differentiate between the two and in case they committ mistakez they come up with certain prenotions to defend themselves by which the whole concept of righteousness itself is wronged. Perceiving the drama from this way, Inspector Koo is secondarily a revenge game where someone tries to avenge the right by unlawful means and another who tries to stop the former because righteousness can never be achieved when you commit the same mistake.

The drama also focuses on mental health issues. Abnormal and morally dangerous personalities induced by lonliness and trauma can harm the society in many ways and the drama is yet another portrayal of that. I am happy they has also emphasized on that.

The 2 important elements of Inspector Koo are investigation and comedy. Again, thia drama is a great treat for the lovers of investigative thrillers. Although you known who the culprit is, it really takes a great effort and time to figure the situation, motive and consequences. Connecting the dots and drawing a figure is all yoh have to do and this drama did it brilliantly. There are several highs and lows in the status but what matters is the end, and I assure it was as compelling as the entire show. Many shows claiming to be of dark comedy genre actually fail to understand what dark comedy is but the writer of Koo has done a good job in doing her homework. The main source of comedy is Koo herself and anything involving her might look serious but they simultaneously make you burst into immense laughter too. Several scenes which scare you off about the consequences, also seem weirdly funny, and that's how it should have worked, I mean that's how it happened. I had a good time watching the entire show.

Overally, Inspector Koo is an amazing drama and it has also those entertaining factors. I thoroughly enjoyed the show and honestly wanted more episode tho I don't wanna complain. The basic storyline of chasing after villain is not something new but the screenwriting and plus the execution along with music surely make it a stupendous thing. It's a must watch in my opinion with high reawatch value, so definitely coming back to it.

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36 people found this review helpful
Nov 7, 2023
12 of 12 episodes seen
Completed 0
Overall 9.5
Story 9.0
Acting/Cast 10
Music 10
Rewatch Value 9.0
This review may contain spoilers

Mystery, Mischief and Mayhem: The Intriguing World of Inspector Koo

As i was looking forward to Lee Young Ae's upcoming show maestra, so i decided to watch one of her previous dramas. I chose Inspector Koo and to my surprise, i ended up binge watching the entire series. It turned out to be much more interesting than i had initially anticipated, i can even say that i absolutely loved it.
The show revolves around a retired, eccentric Inspector Koo and a 20 something psychopathic serial killer. Despite their differences, they share a certain resemblance.

Inspector Koo, now retired spends her days playing online games, neglecting personal hygiene and eating habits. On the other hand, the young serial killer leads a stylish, charming and luxurious life. Interestingly their names are mirror images of each other, with Inspector Koo named Kyung Yi and the serial killer named Yi Kyung. However, their common trait is their intelligence and the entire series plays out like a thrilling game of cat and mouse.

Yi Kyung the college going killer, targets people who have committed wrongs & her killing methods are truly unique. She doesnt resort to direct violence. instead, she sets elaborate traps for her targets making her plans even more captivating. Another intriguing aspect of her character is that she only targets individuals who had done bad deeds in a past.
What sets her apart is her unusual method of punishing wrongdoers, she draws inspiration from various French books translating their ideas into her killing plans. Each book represents one murder.

Inspector Koo's character on the other hand, is far from the typical justice seeking detective. She takes on new cases from her junior solely because she offers her a new computer. Her motivation isnt rooted in a desire for justice but rather in the thrill and enjoyment of solving cases.

The drama also features one more strong villain, portrayed by the Kim Hae Sook, whose performance here rivals her best acting in Revenant and UTQU.
Both of these female villains Yi Kyung & Kim Hae Sook's character has very comeplx yet interesting relation which makes show even more exciting. At times they collaborate, assist one another and then turn against each other while Inspector Koo cleverly takes advantage of their enmity.

My most fav character in the series is Santa, played by Baek Sung Chul, a mute character introduced as Koo's assistant picked from an online game. Their bond isnt romantic but more like a parent and child, where he plays role like parent to Inspector Koo, they often shows him taking care of her in show. There is one interesting plot twist involving his character.

The show includes a few more interesting characters including Yi Kyung's accomplice, who happens to be gay, which i didnt expect in this type of series. What sets the serial killer characters apart is their multifaceted nature. They can appear as psycho killers in one moment and as normal individuals in the next.

Inspector Koo distinguishes itself from OCN's countryside thrillers by being a highly urban thriller set in Tongyeong, an unexplored location in Kdramas. The setting combined with the cinematography provides a fresh and beautiful backdrop for the series.

The top notch cinematography and the stylish OSTs/BGMs elevate the series to another level, enhancing the thrill of key moments. Without these elements, I might have rated the show lower.

The episodes end on suspenseful notes, leaving viewers eager for the next ones and despite some minor plot holes, i thoroughly enjoyed the series. In fact i found it more appealing than highly rated crime thriller dramas with MDL scores ranging from 8.6 to 8.8.

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  • Drama: Inspector Koo
  • Country: South Korea
  • Episodes: 12
  • Aired: Oct 30, 2021 - Dec 12, 2021
  • Aired On: Saturday, Sunday
  • Original Network: jTBC, Netflix
  • Duration: 1 hr. 10 min.
  • Content Rating: 15+ - Teens 15 or older


  • Score: 8.2 (scored by 6,068 users)
  • Ranked: #1621
  • Popularity: #1051
  • Watchers: 15,295

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