- Kim Rae-won
- Â Jin Ho-gae 24 episodes, 2022-2023
- Son Ho-joon
- Â Bong Do-jin 24 episodes, 2022-2023
- Gong Seung-yeon
- Â Song Seol 24 episodes, 2022-2023
- Kang Ki-doong
- Â Gong Myeong-pil 24 episodes, 2022-2023
- Seo Hyun-chul
- Â Baek Cham (Detective team leader) 24 episodes, 2022-2023
- Lee Do-yeop
- Â Ma Tae-hwa 24 episodes, 2022-2023
- Woo Mi-hwa
- Â Dok Ko-soon (Taewon fire station) 24 episodes, 2022-2023
- Son Ji-Yoon
- Â Yoon Hong (NFS) 24 episodes, 2022-2023
- Yoon Sang-hwa
- Â Yang Sang-man 3 episodes, 2022-2023
- Lee So-e
- Â Kim Hyun Seo 3 episodes, 2022
- Hong Dong-Yeong
- Â Kang Do-ha (young) 2 episodes, 2022-2023
- Yoon Seok-hyun
- Â Cho Doo Chil 2 episodes, 2022
- Choi Won-young
- Â Ha Yeong-doo 2 episodes, 2023
- Lee Ji-hoon
- Â Gangster 2 episodes, 2023
- Cho Dong-in
- Â Boyfriend 1 episode, 2022
- Lee Ji-Won
- Â Kim So-hee 1 episode, 2022
- Yoon Seo-hyun
- Â Cho Man-sik (Hyeon-seo's biological father) 1 episode, 2022
- Jang In-ho
- Â Medical waste staff 1 episode, 2022
- Jeon Jae-Hong
- Â Woo Mi-young's co-worker 1 episode, 2022
- Lee Jeong-eun
- Â Moon Gu's wife 1 episode, 2023
- Choi Ja-woon
- Â Restaurant boy 1 episode, 2023
- Jo Deok-hyeon
- Â Judge An 1 episode, 2023
- Roh Haeng-Ha
- Â Park Yong-soo's wife 1 episode, 2023
