Bad and Crazy
"An unlikely duo unites to regain humanity!"
A tvN Original
Bad and Crazy follows Soo-yeol, a detective who has spent his career chasing wealth and status rather than truth. A hidden alter ego, known only as K, awakens inside him and rewires his sense of justice. The split persona drives him to challenge corruption within the police and the system, even... Read more
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Streaming availability last verified: January 14, 2026
About Bad and Crazy
Bad and Crazy follows Soo-yeol, a detective who has spent his career chasing wealth and status rather than truth. A hidden alter ego, known only as K, awakens inside him and rewires his sense of justice. The split persona drives him to challenge corruption within the police and the system, even as it drags him toward methods that blur the line between law and vengeance. Public Soo-yeol remains cool and calculating, while K acts with a brutal, uncompromising clarity that unsettles colleagues, suspects, and friends. The drama leans into the tension between orderly procedure and uncompromising power, pushing Soo-yeol to decide how far he will go to expose wrongdoing without losing himself. Its pacing is brisk and kinetic.
Directed by You Sun-dong and created by Kim Sae-bom, Bad and Crazy arrives as an original concept that blends crime drama with sci-fi elements, offering stylish pacing and a sleek modern feel. It features Lee Dong-wook and Wi Ha-jun.
Reception notes the show for its brisk energy and sharp contrasts between its two leads. Core themes include dual identity, the cost of corruption, and whether justice can survive when rules or loyalties bend, especially under pressure from powerful criminals and within the police.
Fans have picked up on the tension between a stoic detective and a vigilante alter ego, praising the style of action sequences and the moral questions raised. The pairing signals a distinctive mood within its genre and invites comparisons with other urban fantasy thrillers.
Details
- Release Date
- December 17, 2021
- Episode Length
- 1h 10m
- Rating
- TV-MA
- User Ratings
- 101 votes
- Type
- TV Series
- Seasons
- 1
- Episodes
- 12
- Network
- tvN
- Status
- Ended
- Genres
- Action & Adventure, Crime, Drama, Sci-Fi & Fantasy
- Country
- South Korea
- Studio
- Studio Dragon
- External Links
- View on IMDB
Official Trailer
Cast
Lee Dong-wook
Ryu Soo-yeol
Wi Ha-jun
K
Han Ji-eun
Lee Hee-gyeom
Cha Hak-yeon
Oh Kyung-tae
Kang Ae-sim
Seo Seung-sook
Kim Dae-gon
Ryu Dong-yeol
Cha Si-won
Yang Jae-seon
Lee Sang-hong
Do In-bum
Kim Hieora
Boss Yong
Lee Seung-heon
Kim Kyung-joon
Director: You Sun-dong
Created by: Kim Sae-bom
Seasons (1 season, 12 episodes)
Season 1
12 episodes - 2021