Dr. Brain (Dr. 브레인)
Dr. Brain (Dr. 브레인) is a 2021 South Korean science fiction thriller television series directed by Kim Jee-woon for Apple TV+, based on the Korean webtoon of the same name by Hongjacga. It follows brain scientist Sewon Koh, who after a family tragedy conducts "brain syncs" with the dead to access their memories for clues.1 The series was the first Korean-language original produced for Apple TV+ and launched the streaming service in South Korea on November 4, 2021.2 • 3
| Key fact | Detail |
|---|---|
| Platform milestone | First Korean-language original series for Apple TV+; launched the service in South Korea2 • 3 |
| Run | Premiered November 4, 2021; six episodes released weekly; finale December 10, 20214 • 5 |
| Source | Webtoon by Hongjacga, original story by Cho Jae-hong; screenplay by Kim Jin A, Koh YoungJae, and Kim Jee-woon2 |
| Lead cast | Lee Sun-kyun as Sewon Koh, with Lee Yoo-young, Park Hee-soon, and Seo Ji-hye1 |
| Production companies | Bound Entertainment, Kakao Entertainment, StudioPlex, and Dark Circle Pictures2 |
| Reception | 85% Tomatometer and 77% Popcornmeter on Rotten Tomatoes; 6.7 on IMDb6 • 7 |
| Recognition | Lee Sun-kyun nominated for the 2022 International Emmy for Best Performance by an Actor8 |
Spoilers
Premise
Sewon Koh (Lee Sun-kyun) is a brilliant, research-obsessed brain scientist whose family falls victim to a mysterious accident. Desperate to uncover what happened to his wife Jaeyi (Lee Yoo-young) and son Doyoon, he advances a risky "brain sync" system that lets him access the consciousness and memories of the dead, including his wife's, to piece together the mystery.1 • 2 The investigation draws in a private investigator, Kangmu Lee (Park Hee-soon), and Lieutenant Choi (Seo Ji-hye), and makes Sewon a target as he uncovers a plan set in motion around him and his family.1
The series mixes genres. Reviewers describe it as alternating between family melodrama, science fiction, and police thriller,9 and Common Sense Media characterizes it as a morbid Korean sci-fi thriller with violence and drinking, rated TV-MA.1
Production
From film plan to series. Apple announced the series order in March 2021, when the show was already in production in South Korea.2 Kim Jee-woon, known for films including A Tale of Two Sisters, I Saw the Devil, and The Age of Shadows, said he first thought the story could work as a film but chose a series to take the narrative in a richer, deeper direction.10 • 11 He structured the six episodes in three movements: episodes 1 and 2 build the story, episodes 3 and 4 accelerate the unraveling, and episodes 5 and 6 resolve it.10
Scientific consultation. Kim consulted Jeong Jae-seung, a brain scientist at KAIST, on whether entering a person's memories is theoretically possible. Kim said he confirmed the idea was possible in principle, grounded in real experiments, and then added dramatic elements on top of that basis.12
Release pattern. Unlike many streaming originals that release a full season at once, Apple TV+ released one episode per week.12 Episodes run roughly 50 to 70 minutes each.1
Adaptation approach
Kim said he wanted to preserve the webtoon's atmosphere, which he described as a noir style with strong contrasts of light and dark, a graphic-novel format he personally likes.12 Compared with the original, which he described as a fast-paced murder mystery, he added his own vision and narrative to enrich the series, framing the story of looking into other people's brains as also a story of looking into oneself, confronting one's own deficiencies and growing from them.13
Reception
On Rotten Tomatoes the first season holds an 85% Tomatometer from 20 reviews and a 77% Popcornmeter audience score; the critics consensus describes a heady premise worked through somewhat ponderously, but with plenty of cerebral thrills.6 IMDb users give the series 6.7 out of 10.7 Lee Sun-kyun received a 2022 International Emmy nomination for Best Performance by an Actor for the role.8
The series ran for one season and ended in 2021.5 It remains available on Apple TV+ and its Amazon Channel.7
References
- Dr. Brain, Apple TV
- Apple orders international series "Dr. Brain" from visionary filmmaker Kim Jee-Woon and starring Lee Sun-Kyun, Apple TV Press (March 3, 2021)
- Interview: Kim Jee-woon on Apple TV+'s first Korean original series, Daum News (November 2021)
- Dr. Brain, Apple TV Press (UK)
- Dr. Brain, TVmaze
- Dr. Brain, Rotten Tomatoes
- Dr. Brain streaming information, JustWatch
- Dr. Brain (TV Series 2021) Awards, IMDb
- « Dr. Brain », « Paraiso », « The Unusual Suspects » : notre choix de séries, Le Monde (November 16, 2021)
- Drama debut for director Kim Jee-woon: "OTT is a new room for creators", Yonhap News (November 10, 2021)
- Dr. Brain director reveals he initially wanted to adapt the story to film, NME (November 12, 2021)
- Interview: Dr. Brain director Kim Jee-woon, Asia Economy (November 10, 2021)
- Interview with director Kim Jee-woon on Apple's first Korean drama, KBS kstar (December 10, 2021)
Topic: Encyclopedia › Arts and culture › Screen and stage › Film and television › Series and fictional screen worlds › International serial drama and telenovelas › East Asian drama series › Korean contemporary drama › Fantasy, supernatural, and science fiction series › Premiered 2010 to 2022
Initially written Oct 3, 2026 · Reviewed: Oct 3, 2026; Oct 25, 2026 · Edited: Oct 15, 2026; Oct 25, 2026; Nov 1, 2026 · Last review: Oct 25, 2026
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