Episode guide
Stranger: Season 1
16 episodes · premiered Jun 10, 2017
An unlikely partnership is forged, between a passionate cop and an emotionless prosecutor, to bring an evasive serial killer to justice.
- Episode 1: I Am Innocent Jun 10, 2017 · 1h 17m As a teen, prosecutor Hwang Si-mok received surgical treatment for his abnormally developed brain, but the procedure left behind serious side effects.
- Episode 2: Just Turn On The Lights Jun 11, 2017 · 1h 9m The convict's strong plea for his innocence prompts Si-mok to review the CCTV clip. At the Yongsan police station, he runs into officer Han Yeo-jin.
- Episode 3: A New Possible Suspect Jun 17, 2017 · 1h 16m Si-mok volunteers to appear on live national TV to discuss Kang Jin-seob. He also makes a bold promise to find the culprit within two months.
- Episode 4: Kwon Min Ah Jun 18, 2017 · 1h 9m Rumors quickly spread about Si-mok's violent nature. Regardless, he persists in his investigation. He finds his mentee, Young Eun-su, suspicious.
- Episode 5: The Second Huam-dong Case Jun 24, 2017 · 1h 3m Si-mok, puzzled by the details of the most recent murder case, visits the victim's home to seek more clues. Yeo-jin joins him in the investigation.
- Episode 6: The Ringtone Jun 25, 2017 · 1h 4m New pieces of evidence only increase the list of possible suspects. In the midst of the confusion, a few begin to question Si-mok's innocence.
- Episode 7: Ga Young's Phone Jul 1, 2017 · 1h 11m Si-mok and Yeo-jin team up to covertly pursue Seo Dong-jae. Just as Dong-jae is about to throw something into the Han River, Yeo-jin stops him.
- Episode 8: Western Seoul Prosecutors' Office Jul 2, 2017 · 1h 7m Enraged by what the police did to Park Kyung-wan, Yeo-jin tries to confront her superior but is stopped by Si-mok, who warns her of the consequences.
- Episode 9: Special Investigation Jul 8, 2017 · 1h 6m Si-mok selects key lawyers and police officers to be part of the special investigations team. Their probe begins with Dong-jae as the starting point.
- Episode 10: Revelation Jul 9, 2017 · 1h 7m Fearing for Ga-young's safety, Yeo-jin proceeds to transfer her to a different hospital. A nurse informs Yeo-jin of something strange that happened.
- Episode 11: Cold and Damp Jul 15, 2017 · 1h 8m The truth behind Ga-young's convulsions is revealed. Chang-jun's wife receives a travel ban. Woo-gyun asks Chang-jun to help him get out of his mess.
- Episode 12: Disbandment Jul 16, 2017 · 1h 6m Si-mok and Yeo-jin discover perplexing leads while searching Kyung-wan's basement. Dong-jae goes back to Chang-jun's office to fetch his cell phone.
- Episode 13: 0 and 7 Jul 22, 2017 · 1h 7m Returning home from the rooftop party, Si-mok discovers that an intruder has left something in his bedroom. Yeo-jin and Geon come over right away.
- Episode 14: Another Body Jul 23, 2017 · 1h 6m Yeo-jin suspects a new killer is involved in the latest murder incident. Meanwhile, Si-mok collapses after leaving the autopsy.
- Episode 15: Accomplice Jul 29, 2017 · 1h 17m Yeo-jin collects evidence as Si-mok interrogates the suspect. Many questions get answered, but the most important problem of all remains to be solved.
- Episode 16: A Monster Jul 30, 2017 · 1h 26m Si-mok sets out to meet the one he believes is the real murderer. He gets his hands on a bag that will determine the futures of many people.