- Ji Chang-wook
- Â Park Joon-mo 12 episodes, 2023
- Wi Ha-joon
- Â Jung Ki-cheol 12 episodes, 2023
- Im She-mi
- Â Yoo Eui-jung 12 episodes, 2023
- Bibi
- Â Hae-ryeon 12 episodes, 2023
- Ji Seung-hyun
- Â Dohyung Seok 12 episodes, 2023
- Jeong Jae-kwang
- Â Kwon Tae-ho 12 episodes, 2023
- Jeong Man-sik
- Â Jang Kyeong-cheol 12 episodes, 2023
- Park Ji-hoon
- Â Jo Kang-san 12 episodes, 2023
- Lee Shin-Ki
- Â Seo Jong-ryeol 12 episodes, 2023
- Woo Kang-Min
- Â Bok-nam 12 episodes, 2023
- Kim Beom-soo
- Â Detective Go (Min-gu's partner) 12 episodes, 2023
- Cha Rae-hyung
- Â Hong Hee-seong 12 episodes, 2023
- Lee Jung-hun
- Â Jo Chang-sik 12 episodes, 2023
- Lee Han-ju
- Â Jeong Byeong-woo 12 episodes, 2023
- Han Yi-jin
- Â Cheol-gon 12 episodes, 2023
- Jo Deok-hyeon
- Â Park Jae-man (Joon-mo's father) 2 episodes, 2023
- Ko In-beom
- Â Kwon Tae-Ho's dad 1 episode, 2023
- Lee Jae-woo
- Â Hwang Min-Goo's colleague 1 episode, 2023
- Seo Yi-Ra
- Â Wendy (Yankee's girlfriend) 1 episode, 2023
- Cha Hee
- Â Jung Gi-Cheul's wife 1 episode, 2023
- Kim Wook
- Â Lee Hyang-Jin 1 episode, 2023
- Kwak Hee-Joo
- Â Cha Bong-Ju 1 episode, 2023
- Kim Moon-Chan
- Â Eumseong squad chief 1 episode, 2023
- Joo Ho Sung
- Â Yoo Deok Hoon [Eui Jung's father] 1 episode, 2023
- Im Sung-jae
- Â Choi Jeong-bae unknown episodes
- Geum Gwang-san
- Â Baby unknown episodes
