TV series
An unlikely duo unites to regain humanity!
A superhero drama about Soo-yeol who has lived his whole life as a materialistic police detective, but changes into a champion for justice and fights against police corruption when a hidden persona called "K" awakens inside him.
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Checked Jul 22, 2026
A superhero drama about Soo-yeol who has lived his whole life as a materialistic police detective, but changes into a champion for justice and fights against police corruption when a hidden persona called "K" awakens inside him.
Cast, crew and production details
Lee Dong-wookRyu Soo-yeol
Wi Ha-junK
Han Ji-eunLee Hee-gyeom
Cha Hak-yeonOh Kyung-tae
Kang Ae-simSeo Seung-sook
Kim Dae-gonRyu Dong-yeol
Cha Si-wonYang Jae-seon
Lee Sang-hongDo In-bum
tvNSouth Korea
Studio DragonSouth KoreaWatch options above are for the show and may vary by season or episode.
Episode 1
After getting an officer suspended from service, Ryu Su-yeol gets a step closer to a promotion. Oh Gyeong-tae looks for a young girl's missing mom.
Guest stars Han Sang-chul, Ji Seong-geun, Choi E-sun, Kim Jae-man, Nam Jeong-woo, Lee Jae-eun, Lee Jung-yeol, Kang Jeong-im
Where to watch Bad and Crazy
Episode 2
Su-yeol retraces Gyeong-tae's steps while tracking down the man in the helmet. Lee Hui-gyeom goes after a necklace that may hold crucial evidence.
Guest stars Yoo Seung-il, Yoon Tae-in, Lee Seo-an, Kim Si-ha, Kim Moon-ho, Seol Chang-hee, Park Yu-mil, Lee Dong-kyu
Where to watch Bad and Crazy
Episode 3
Su-yeol falls from Do Yu-gon's good graces. While searching for the necklace at home, Su-yeol finds a collection of objects that are not his.
Guest stars Lee Seo-an, Im Sung-jae, Park Ji-hong, Park Seon-Hu, Nam Do-yoon
Where to watch Bad and Crazy
Episode 4
After ensuring Gyeong-tae's safety, Su-yeol pulls a dirty move. With Kim Gye-sik back on the force, the narcotics unit tracks down a street drug.
Guest stars Yoon Tae-in, Lee Seo-an, Kim Si-ha, Lee Joo-hyun, Kim Kyu-baek, Jeon Jun-woo, Kim Nam-jin, Kim Hyeon-mok
Where to watch Bad and Crazy
Episode 5
Su-yeol searches high and low to prove Hui-gyeom's innocence. But the deeper he dives into the case, the closer he comes to falling into a trap.
Guest stars Lee Joo-hyun, Lee Kyeong-uk, Nam Woo-joo, Kim Hyeon-mok, Lee Jong-yoon, Kim Won-suk, Yoon Dae-yeul, Gyeong Gi-hyeon
Where to watch Bad and Crazy
Episode 6
Su-yeol reopens a closed case. He teams up with K to investigate quietly and uncovers the opponent's weakness. Meanwhile, the body count grows.
Guest stars Lee Kyeong-uk, Nam Woo-joo, Joo Yeon-a, Shin Joo-hyup, Kim Shin-rock, Han Sa-myeong, Han Ji-ho, Kim Joo-Young
Where to watch Bad and Crazy
Episode 7
Su-yeol and Hui-gyeom shift focus to the head of the drug cartel. Ms. Yong threatens the police to get the seized assets back in her hands.
Guest stars Han Ji-ho, Kim Joo-Young, Shin Na-ra, Noh Jeong-hwan, Lee Joo-young
Where to watch Bad and Crazy
Episode 8
Su-yeol learns that K is closely linked to his childhood trauma. A girl shows up at the police station, delirious and covered in someone else's blood.
Guest stars Nam Do-yoon, Lee Joo-young, Park Se-in, Kim Bi-bi, Hong Je-In, Lee Jae-Hak, Lee Ji Wan, Gu Da-song
Where to watch Bad and Crazy
Episode 9
When bits of his memory return, Su-yeol reexamines the murder of his father. Finding similar cases, he learns one person was involved in all of them.
Guest stars Im Seong-mi, Park Seon-Hu, Nam Do-yoon, Kim Yong-Han, Shin Mun-sung, Park Seo-yeon, Park Min-sang, Seo Jung-hoo
Where to watch Bad and Crazy
Episode 10
As the identity of X comes to light, his deranged schemes pick up pace. He comes between Su-yeol and K by revealing K's murderous instincts.
Guest stars Park Ji-hong, Nam Woo-joo, Nam Do-yoon, Kim Mi-hwa, Yi Seo, Yang Dae-hyeok, Jung Yoon-suk, Jeong Seon-cheol
Where to watch Bad and Crazy
Episode 11
Su-yeol visits Shin Ju-hyeok to seek treatment, but unleashes a very angry K instead. A victim opens up after an attempted suicide.
Guest stars Park Seo-yeon, Park Min-sang, Jang Jun-nyeong, Kim Young-Joo, Kim Yong-jin, Park Jong-geun, Kim Sun-hoa
Where to watch Bad and Crazy
Episode 12
Su-yeol's hunt for the truth endangers those around him. He has a final face-off with the crazed killer at the place where it all began.
Guest stars Nam Do-yoon, Lee Jong-yoon, Kim Mi-hwa, Park Min-sang, Jung Yoon-suk, Park Jong-geun, Kim Sun-hoa, Lee Haney
Where to watch Bad and CrazyEpisode information updated Jul 22, 2026
