Episode 1
The Murder Case From Five Years Ago
On their first day as partners, detectives Kang Do-chang and Oh Ji-hyeok pick up a series of calls with perplexing connections to a closed murder case.
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TV series
The Good Detective
2020TV-MA2 seasons7.2 / 10
A drama about the race between people who want to get closer to the truth and those who want to cover it up. Jang Seung Jo will take on the role of Oh Ji Hyuk, an elite detective of nine years who does not share his feelings with others due to pain he experienced when he was young. He is not swayed by money and power, even with the huge wealth he inherited from his uncle.
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Where to watch in United States
Checked Jul 22, 2026
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Synopsis
A drama about the race between people who want to get closer to the truth and those who want to cover it up. Jang Seung Jo will take on the role of Oh Ji Hyuk, an elite detective of nine years who does not share his feelings with others due to pain he experienced when he was young. He is not swayed by money and power, even with the huge wealth he inherited from his uncle.
Season 1 episodes
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Episode 2
No Sinner Shall Sleep Peacefully At Night
Words get out of Incheon Seobu Police Station revealing that Lee Eun Hye, the daughter of a murderer Lee Dae Chul, has been kidnapped, murdered, and buried by a man who claims to be the culprit. As the news goes viral, people who were related to the murder case from five years ago tremble in fear of possibilities of getting brought to justice.
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Episode 3
The Execution
The execution of death-row convict Lee Dae Chul nears as well as the evaluation for Do Chang’s promotion. Knowing that Lee Dae Chul has an alibi at the time of the murder, Do Chang needs to decide whether to save an innocent man or to submit to the authority. Meanwhile, Do Chang and Ji Hyuk are joined by Seo Gyeong at Dae Chul’s old workplace, and that’s when Seo Gyeong gets a phone call from Park Gun Ho, who seemed to sound very urgent.
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Episode 4
We Are Only Humans
A big body of corruption sweeps over Violent Crimes Unit Two with the higher-ups continuously pressuring them to turn a blind eye to Lee Dae Chul’s case. Meanwhile, Ji Hyuk saves Seo Gyeong from Jo Seong Dae who is suspected of killing Park Gun Ho. Eventually, clues that lead to Lee Dae Chul’s innocence start piling up as Do Chang decides to look into the case to clarify discomforting ambiguities.
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Episode 5
We Are Trying To Save A Person’s Life
While clues proving a corruptive body’s close relation to Lee Dae Chul’s case pile up, Do Chang figures out a work-around to carry out a secret investigation on Jo Seong Dae. On top of that, Ji Hyuk hints to him how his very cousin, Oh Jong Tae, may be partially responsible for Yoon Ji Sun’s death from five years ago. Meanwhile, Dae Chul’s day of execution nears as his daughter, Eun Hye, visits him at the prison.
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Episode 6
Not Everyone Is Self-Centered
Do Chang confesses to Eun Hye that he wants to save her father, Lee Dae Chul. Unfortunately, Eun Hye can’t trust Do Chang who literally handcuffed and arrested her father for a murder he didn’t commit. However, Do Chang shows a sign of hope for Eun Hye by getting the re-trial approved. Meanwhile, Superintendent Moon and Yoon Sang Mi prepare themselves for the possibility of an unexpected turn of events.
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Episode 7
Every Truth Has Two Opposing Stories
Although Do Chang and Mr. So prepare for the retrial of Lee Dae Chul’s case, Do Chang still needs to persuade Dae Chul to follow his lead because he is reluctant to take part in it due to the possibility of harm that it may cause his daughter. Meanwhile, Do Chang finds himself caught in a dilemma that is inflicting harm to both the victims who lost their beloved partners and the ones who crossed the line for their greed.
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Episode 8
Do Chang on a Witness Stand
It was already difficult enough for Do Chang and others to get a retrial approved. However, feeling desperate during the trial, Dae Chul falsely admits to his killing of Detective Jang Jin Soo. Meanwhile, Seo Gyeong receives a recording from an unknown sender of a conversation between Superintendent Moon and a prosecutor, which could act as solid evidence to prove Dae Chul’s innocence.
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Episode 9
A Voice Recording of Superintendent Moon
After losing at the retrial, Do Chang gets demoted. With Do Chang out of the picture, Violent Crimes Unit Two also feels pointless to even fight for a comeback. Meanwhile, Ji Hyuk meets Seo Gyeong and finds out about a voice recording that she’s been keeping secret. Ji Hyuk and Do Chang then indirectly threaten Superintendent Moon so that they can follow him and see where he would lead them.
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Episode 10
The One Behind Jo Seong Dae
Do Chang gets reinstated and returns to Violent Crimes Unit Two after coming to an agreement with Superintendent Moon. The team then focuses on Park Gun Ho’s case and stumbles upon Jo Seong Dae’s bloodstain at the murder site. This leads to the revelation of Chief Nam's wrongdoing as well as a possible connection to Oh Jong Tae. Just before closing in on Jo Seong Dae, the team catches the sight of the one behind the corruption.
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Episode 11
Do Chang Goes After Oh Jong Tae
With the help of a little stunt pulled off by Jae Hong, Do Chang gets one step closer to proving Oh Jong Tae’s crime. Meanwhile, Ji Hyuk barges into Yoo Jeong Seok’s office, asking if he is closely acquainted with his cousin, Oh Jong Tae. Even with all evidence closing in on him, Oh Jong Tae still holds what seems to be the key to shaking off all things that annoy him.
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Episode 12
You Can't Die Just Yet
While Ji Hyuk manages to survive the ambush by Oh Jong Tae, the prosecution adds more pressure to Do Chang and his colleagues, invalidating their efforts to bring Oh Jong Tae down. Do Chang however continues to put pieces together and stumbles upon a crucial link that connects Oh Jong Tae to his evil deed. Meanwhile, Seo Gyeong finds out that her boss, Yoo Jeong Seok, was at the murder scene five years ago.
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Episode 13
The Remains Of A Dead Body Near Gawol Church
Jin Seo Gyeong hosts a secret meeting with Yoo Jeong Seok and Kim Gi Tae at Gawol Church, demanding them the truth regarding a missing person named Jo Seong Gi. In the meantime, Do Chang and Ji Hyuk successfully locate the missing dead body from five years ago. Despite the evidence against their favor, Oh Jong Tae and Nam Guk Hyun cook up a loophole to clear the charges.
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Episode 14
Those Who Deserve To Die
Even after the arrest, Oh Jong Tae still has the audacity to claim his innocence and goes on to emphasize the incompetence and corruption of the police organization. Meanwhile, Seo Gyeong and Sang Mi sidestep to approach the matter in their own way. Eventually, Do Chang reaches Yoo Jeong Seok with a warrant, and Jeong Seok shocks everyone by uttering a short confession.
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Episode 15
Something Worth Dying For
Yoo Jeong Seok admits to his doings before his junior reporters and leaves the office, ordering them to stay put until his next instruction. While being threatened by Oh Jong Tae, Nam Guk Hyun offers video footage of Jeong Seok’s murders. On the verge of being exposed, Jeong Seok willingly suggests the police that he would confess in his unique manner. The confession is officially published.
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Episode 16
The Last Target
The shocking death of Yoo Jeong Seok stirs up the public, and the case is now under a spotlight. As the prosecutor makes a confession to his previous wrongdoing out of conscience, Oh Jong Tae gets sentenced to a lifetime in prison. However, Ji Hyuk’s gut feeling tingles down his back, and he starts searching for something. Something that might just reveal the truth behind the death of a fellow detective, Jang Joon Gi.
Where to watch The Good DetectiveEpisode information updated Jul 22, 2026
More about The Good Detective
Cast
Son Hyun-jooKang Do-chang
Jang Seung-joOh Ji-hyeok
Lee ElijahJin Seo-kyeong
Kim Hyo-jinCheon Na-na
Jung Moon-sungWoo Tae-ho
Cha Rae-hyungKwon Jae-hong
Jung Soon-wonJi Man-gu
Ji Seung-hyunYoo Jeong-seokCredits
- Created by
- Cho Nam-guk, Choi Jin-won
- Written by
- Choi Jin-won
Production details
- Status
- Ended
- Series type
- Scripted
- Episodes
- 32
- Original language
- Korean
- Original title
- 모범형사
Networks & production
JTBCSouth Korea- Blossom StorySouth Korea
- JTBCSouth Korea
JTBC StudiosSouth Korea
Themes
bromancecorrupt legal systemcorruptioncrime suspensedetectivefriendshipinvestigationmurder
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