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Inspector Koo

Inspector Koo: Lee Young Ae, Kim Hye Jun, Kim Hae Sook

inspector koo drama cast and synopsis
Credit: JTBC

General Information

  • International Title: Inspector Koo
  • Original Title: 구경이 (romanization: Kookyungyi)
  • Genre: Action, Thriller, Comedy
  • Episode: 12
  • Airing Date: 2021.10.30 ~ 2021.12.05
  • Airing Slot: Saturday & Sunday 22:30 KST
  • Broadcasting Channel: JTBC
  • International Distributor: Netflix, TVING
  • Starring: Lee Young Ae, Kim Hye Jun, Kim Hae Sook
  • Director: Lee Jung Heum
  • Writer: Sungchoyi
  • Highest Rating: TBA
  • Awards: N/A


Inspector Koo Kyung Yi is 40 year old former police officer who spends her life for games and alcohol. She used to be an intelligent police officer with excellent intuition. However, she currently works as insurance investigator. Later, she has to catch and investigate a serial killer.

Main Cast

inspector koo drama cast lee young ae
Credit: JTBC

Character name: Koo Kyung Yi
Actress name: Lee Young Ae
Lee Young Ae’s notable works: Sympathy for Lady Vengeance (movie), One Fine Spring Day (movie), Taxi Driver, Saimdang, Memoir of Colors, A Jewel in the Palace, etc

inspector koo kim hye jun

Credit: JTBC

Character name: K
Actress name: Kim Hye Jun
Kim Hye Jun’s notable works: Sinkhole (movie), Chip In, Kingdom Season 2, Kingdom, Rain or Shine, Dr. Romantic, etc

kim hae sook
Credit: JTBC

Character name: Yong Sook
Actress name: Kim Hae Sook
Kim Hae Sook’s notable works: Hospital Playlist 2, Start-Up, Hospital Playlist, About Time, My Father is Strange, Pinocchio, I Can Hear Your Voice, etc

Extended Cast

Kwak Sun Young Na Je Hui
Jo Hyun Chul as Oh Kyung Soo
Baek Sung Chul as Santa
Lee Hong Nae as Gun Wook
Bae Hae Sun as Jeong Yeon
Jung Suk Yong as Manager Kim
Choi Dae Chul as Heo Sung Tae
Park Ji Bin as Heo Hyun Tae
Kim O Bok as Kim Won Sik
Bae Myung Jin as member of Inspection Team A
Choi Young Joon as Jang Seong Woo
Lee Han Joo as Kim Yeong Ju

Cameo & Special Appearances

Kim Kang Hyun as Kim Min Gyu (Ep. 1-2)
Park Ye Young as Yoon Jae Young (Ep. 1-2)
Kang Hak Soo as janitor (Ep. 1)
Lee So Geum as deliveryman (Ep. 1)
Ahn Tae Rin as Kim Seon Mi (Ep. 1-2)
Jeon Suk Chan as detective (Ep. 1-2)
Ahn Ryeo Jin as escort (Ep. 1-2)
Lee Dong Wook as fisherman (Ep. 1-2)
Choi Hee Jin as Son Ji Yoo (Ep. 2)
Park Yong as back pain client (Ep. 2)

Character Relationship Chart

inspector koo character relationship chart
Credit: JTBC (edited & translated by Kepoper)

Koo Kyung Yi is 40 year old former intelligent police officer. Her life gets terrible after her husband death. She is addicted to alcohol and game. She currently works as insurance investigator and private detective. Meanwhile, K or Song Yi Kyung os a mysterious college student. Later, K becomes the suspect for serial killer case who will investigated by Koo Kyung Yi and NT Life Insurance investigation team.

Original Soundtrack

“Yeah (Round and Round)” by TRPP

Teaser & Trailer Videos

Awards & Nominations



  • Inspector Koo takes over JTBC’s drama Lost time slot on Saturday and Sunday
  • The first script reading started in May 2021
  • Inspector Koo becomes Lee Young Ae‘s comeback drama after 4 years since SBS’ drama Saimdang, Memoir of Colors in 2017
  • The filming location takes place in Tongyeong, Gyeongsangnam

What do you think?


Written by 고나나

A quirky dark academian

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