- Kim Ji-won (Gye Su-jeong)
- Lee Jung-eun (Jeong Hee-sook)
- Son Hyun-joo (Bu Seung-gwon)
- Kim Woo-seok (Park Tae-Kyeong)
- Lee Jin-hee (Jo Won-jin)
- Kim Young-min (Do Yoon-sik)
- Lee Sung-wook (Bae Heung-gon)
- Kwon Seung-woo (Ma Seong-gyoo)
- Heo Joon-seok (Kim Seong-jin)
- Kim Young-ah (Lee Seon-ae)
- Choi Deok-moon (Yang Eung-goo)
- Kim Jung-young (Yoo Mi-kyeong)
- Choi Gwang-il (Goo Bon-pyeong)
- Jeong Seok-yong (Kim Chang-soo)
- Choi Yeon-hwa (Patient)
- Kim Gyeong-min (Im Ho-seok)
- Kim Jong-goo (Kim Myeong-seop)
- Jang Seung-jo (Special appearance)
- Kim Hak-Soo (Professor Hwang)
- Jang Myung-jin (Police)
Doctor X: Mafia in White — S1E12
Episode: Episode 12
Air Date: 2026-11-14