- Seo Kang-joon
- Â Kim Sae-Ha 10 episodes, 2022
- Kim Ah-jung
- Â Jung Sae-Byeok 10 episodes, 2022
- Kim Mu-yeol
- Â Song Eo-jin 10 episodes, 2022
- Lee Si-young
- Â Ghost 10 episodes, 2022
- Victoria Grace
- Â Jung Saebyeok 10 episodes, 2022
- Kim Sung Kyun
- Â Kim Ma-Nok 10 episodes, 2022
- Eugene Ko
- Â Kim Sae Ha 10 episodes, 2022
- Andrew Lee
- Â Director Jo Heung-Sik, Additional Voices 10 episodes, 2022
- Lee Kyu-hoi
- Â Han Wi-han 10 episodes, 2022
- Shim Wan-Joon
- Â Songje Police Station Detective 4 episodes, 2022
- Kim Yeong-Seong
- Â Detective of Songje Police Station investigation team #1 4 episodes, 2022
- Jung Won-joong
- Â Minister of Commerce Industry and Energy 2 episodes, 2022
- Kim Woo-bin
- Â Control room manager (past) 1 episode, 2022
- Lee Hae-young
- Â Kwon Soo-geun (Sae-ha's biological father) 1 episode, 2022
- Choi Seung-hoon
- Â Teen Kim Sae Ha 1 episode, 2022
- Go Yoon
- Â Kim Han Seok's assistant 1 episode, 2022
- Kim Ja-yeong
- Â Nurse 1 episode, 2022
- Jung Gi-sub
- Â Manager (past) 1 episode, 2022
- So Ah-Rin
- Â Teen Jeong Sae Byeok 1 episode, 2022
- Hong Suk-bin
- Â Cashier 1 episode, 2022
- Na-Young Ko
- Â Worker 1 episode, 2022
- Won Choon-gyu
- Â Hardware clerk 1 episode, 2022
- Kim Si-woo
- Â Child Kim Sae Ha 1 episode, 2022
- Melina Demir
- Â Reporter 1 episode, 2022
- Kim Song Il
- Â Doctor 1 episode, 2022
- Seok-je Ju
- Â NFS Researcher 1 episode, 2022
- Kim Kwak Gyeong Hee
- Â Metro cleaner 1 episode, 2022
- Lee Yo-Seong
- Â Kim Jin Yeong 1 episode, 2022
- Lee Jin-Seung
- Â ST Mulsan employee 1 episode, 2022
