The Worst of Evil
The Worst of Evil () is a 2023 South Korean streaming television series starring Ji Chang-wook, Wi Ha-joon, Im Se-mi, and Bibi. It was released on Disney+ on September 27, 2023, at 16:00 (KST). Synopsis 
Set in the 1990s, The Worst of Evil follows undercover police investigators who infiltrate a massive criminal organization responsible for the illegal drug trade between Korea, China and Japan. Cast

Main 
 Ji Chang-wook as Park Jun-mo/ Kwon Seung-ho
 A senior patrol officer from a countryside police station who was ordered to infiltrate Gangnam Union, with the promise of promotion. He uses the name Kwon Seung-ho while in Gangnam Union. Wi Ha-joon as Jung Gi-cheul
 Seo Jun as young Jung Gi-cheul
 The leader of Gangnam Union, the key organization which is leading the drug cartel. Im Se-mi as Yoo Eui-jeong
 Shin So-hyun as young Yoo Eui-jeong
 Jun-mo's wife who is an elite officer in the security division of the Seoul Metropolitan Police Agency. She is also Gi-cheul's first love during high school. Bibi as Lee Hae-ryeon
 A Korean-Chinese drug distributor who came to Korea to trade with Gi-cheul. Supporting

Gangnam Union 
 Lee Shin-ki as Seo Jong-ryeol
 A mid-level executive of Gangnam Union. He is a professional killer who wields his knife, assisting Gi-cheul with his brutal skills. Jung Jae-kwang as Kwon Tae-ho
 Gi-cheul's best friend. Lim Seong-jae as Choi Jeong-bae
 A member of Gangnam Union, and partners with Gi-cheul. He has sharp observation skills, and is rational with strategy to settle issues. Cha Rae-hyung as Hong Hee-seong
 A member of Gangnam Union. Bae Myung-jin as Bae Yong-dae
 The youngest member of Gangnam Union. He partners Jun-mo in surveilling the Gangnam district. Gangnam Police Station 
Ji Seung-hyun as Seok Do-hyung
 The chief detective of the anti-narcotics department. He has been acquaintances with Jun-mo since his high school days, and he was the one who recommended Jun-mo to infiltrate the Gangnam Union. Yoon Kyung-ho as Hwang Min-goo
 A homicide detective from Gangnam Police Station. Kim Beom-soo as Detective Go
 A homicide detective from Gangnam Police Station. Others 
 Jung Man-sik as Jang Kyung-chul
 The leader of another Gangnam organization. Lee Jeong-heon as Cho Chang-sik
 The chief prosecutor of the Seoul District Prosecutors' Office. Dokgo Young-jae as Song Dong-hyuk
 The chief of a Busan gang, and the boss of Kyung-chul. Ye Soo-jung as Yoon Won-gil
 A drug manufacturer, with the nickname Professor Yoon. Park Sang-hoon as Sung Ki-soo
 The leader of Jaegeon Gang. Woo Kang-min as Bok-nam
 The vice leader of Jaegeon Gang. Gyeol Hwi as Cheol-gon
 A member of Jaegeon Gang. He has intended to take advantage of Gi-cheul. Keum Kwang-san as Baby
 The operations leader of an organization opposite of Gangnam Union. Production 
Principal photography began on August 24, 2022, and wrapped up on April 28, 2023. References

External links 
 
 
 

Star (Disney+) original programming
Korean-language television shows
South Korean web series
2023 web series debuts
2023 South Korean television series debuts
South Korean crime television series
South Korean action television series
South Korean thriller television series
South Korean pre-produced television series
Television series set in the 1980s
Television series about illegal drug trade
2023 South Korean television series endings
2023 web series endings