Jin Ho-gae (24 episodes, 2022-2023)
Bong Do-jin (24 episodes, 2022-2023)
Song Seol (24 episodes, 2022-2023)
Baek Cham (Detective team leader) (24 episodes, 2022-2023)
Ma Tae-hwa (24 episodes, 2022-2023)
Gong Myeong-pil (24 episodes, 2022-2023)
Yoon Hong (NFS) (24 episodes, 2022-2023)
Kim Hyun Seo (3 episodes, 2022)
Kang Do-ha (young) (2 episodes, 2022-2023)
Cho Doo Chil (2 episodes, 2022)
Kim So-hee (1 episode, 2022)
Cho Man-sik (Hyeon-seo's biological father) (1 episode, 2022)
Medical waste staff (1 episode, 2022)
Judge An (1 episode, 2023)
Park Yong-soo's wife (1 episode, 2023)