TV series
A never-before-seen inspector.
A reclusive ex-cop reenters the game as an insurance investigator, searching for clues in crime scenes perfectly staged by a serial killer in her midst.
Streaming, rental and purchase options
Checked Sep 2, 2026
Inspector Koo is available to stream on Netflix in United States. Use the direct links below to open the provider.
A reclusive ex-cop reenters the game as an insurance investigator, searching for clues in crime scenes perfectly staged by a serial killer in her midst.
Choose an episode, then use the watch options above for the show.
Episode 1
In need of a big win at work, Na Je-hui plays on Koo Kyung-yi's strengths and weaknesses to enlist her help on a missing person's case.
Guest stars Choi Young-jun, Kim Kang-hyun, Park Ye-yeong, Jeon Seok-chan, Ahn Ryeo-jin
Episode 2
Kyung-yi suspects there's more to this accident than meets the eye. Reuniting with an old classmate, Song Yi-kyung hears about a former teacher's fate.
Guest stars Bae Hae-sun, Choi Young-jun, Kim Kang-hyun, Park Ye-yeong, Jeong Seok-yong, Park Ji-bin, Jeon Seok-chan, Ahn Ryeo-jin
Episode 3
A news story about a criminal's light sentence establishes the next target for "K," who sets the scene at a bustling university campus.
Guest stars Bae Hae-sun, Choi Young-jun, Jeong Seok-yong, Jeong Jong-jun, Park Kang-seop
Episode 4
Santa's chase after "K" puts the team on high alert, especially Kyung-yi. A spooked co-conspirator distances himself from the criminal mastermind.
Guest stars Bae Hae-sun, Choi Young-jun, Park Ye-yeong, Jeong Seok-yong, Jeong Jong-jun, Park Kang-seop, Han Seung-yoon
Episode 5
Jung Jeong-yeon thinks back to a traumatic incident in her niece's past. Following a hunch that "K" might leave the country, Kyung-yi's team sets a trap.
Guest stars Bae Hae-sun, Jeong Seok-yong, Park Ji-bin, Jeong Jong-jun, Choi Dae-chul, Park Ye-ni
Episode 6
Kyung-yi sifts through Yi-kyung's playbooks to find out the next target. An outcast's account takes the team to an IT company headed by a public figure.
Guest stars Choi Young-jun, Kim Kang-hyun, Jeong Seok-yong, Park Kang-seop, Kim Soo-ro
Episode 7
In a high-stakes game of cat and mouse, Kyung-yi tries to find and stop the deadly plans Yi-kyung has set in place for Ko Dam's public event.
Guest stars Bae Hae-sun, Jeong Seok-yong, Jeong Jong-jun, Park Kang-seop, Kim Soo-ro
Episode 8
Yi-kyung's loss plunges her into a world of reckless darkness. Both Yi-kyung and Kyung-yi seek answers on the inexplicable outcome of the event.
Guest stars Bae Hae-sun, Jeong Seok-yong, Jeong Jong-jun, Park Kang-seop, Choi Dae-chul, Kim Soo-ro, Jeong Yoon-hee
Episode 9
Yi-kyung joins hands with Yong-suk, replacing a down-in-the-dumps Kyung-yi who falls out of favor with the strong-handed director.
Guest stars Jeong Seok-yong, Park Ji-bin, Jeong Jong-jun, Park Kang-seop, Choi Dae-chul, Kim Ki-cheon
Episode 10
Kyung-yi inches closer to finding out the truth behind the boat party. Yi-kyung tries to escape the suffocating grasp of Yong-suk's control.
Guest stars Kim Kang-hyun, Jeong Seok-yong, Park Ji-bin, Jeong Jong-jun, Park Kang-seop, Choi Dae-chul, Kim Soo-ro, Kim Ki-cheon
Episode 11
Yong-suk begs for Kyung-yi's help after a video of the yacht party is leaked. Yi-kyung taps a member of Kyung-yi's team for a covert collaboration.
Guest stars Choi Young-jun, Kim Kang-hyun, Park Ye-yeong, Jeong Seok-yong, Park Ji-bin, Jeong Jong-jun, Choi Dae-chul
Episode 12
Santa is held hostage by Yi-kyung, who reveals his identity to a disbelieving Kyung-yi. Yong-suk's plans blow up in her face.
Guest stars Jeong Seok-yong, Park Ji-bin, Jeong Jong-jun, Park Kang-seop, Choi Dae-chul
Episode information updated Sep 17, 2026
Lee Young-aeKoo Kyung-yi
Kim Hye-junSong Yi-kyung / "K"
Kim Hae-sookDirector Yong
Kwak Sun-youngNa Je-hui
Baek Sung-chulSanta
Cho Hyun-chulOh Gyeong-su
Lee Hong-naeAn Geon-uk
Bae Hae-seonJung Jeong-yeon
JTBCSouth Korea
KEYEASTSouth Korea
JTBC StudiosSouth Korea
