- Drama: Bad and Crazy
- Revised romanization: Bad and Crazy
- Hangul: 배드 앤 크레이지
- Director: Yoo Sun-Dong
- Writer: Kim Sae-Bom
- Network: tvN, iQIYI
- Release Date: December 17, 2021 —
- Runtime: Friday & Saturday 22:40
- Language: Korean
- Country: South Korea
Soo-Yeol (Lee Dong-Wook) works as a police officer for the Mooui Police Department. He is competent at his job, but he also has questionable ethics. He will do anything to achieve success. Due to his ambitious personality, he has received promotions in a short period of time. His smooth life suddenly changes with the appearance of K (Wi Ha-Joon). K is a righteous person, but also a crazy person. Whenever he faces injustice, he meets it with a fist. He dreams of being a hero.
Meanwhile, Hee-Gyeom (Han Ji-Eun) works as a police lieutenant on the drug squad at the Mooui Police Department. She is also a righteous person and enthusiastic at her job. She once dated Soo-Yeol.