Seo Hyun-chul

Cha Ho-yeol, Seon-chaek's father and Deok-jeong's husband. He is an upright subject who does not hesitate to speak frankly even in front of the king for the good of the country.

Jeong Yong-jik

Hwang Gyeong-cheol, chief of the police department who is close to Man-sik

Do-hyun's colleague

Cho Pan-sik Lee Suk-hyeong as young Pan-sik

Jang Hak-su

Jang Jung-gyu: the owner and drummer of Oasis Live Jazz Bar.

Baek Cham, the chief detective of Taewon Police Station.

Chae Yoo-jin's step father

Chan-young's father.

Yi-hyun's father

Seo Ho-joon, Hyun-ju's father and Park's adopted father

Oh Dae-yong

Hwang Gab-soo (46/66), the professor in charge of the frozen human experiments. He was seriously hurt in a car accident that caused him to be comatosed, rendering him unable to help Dong-chan and Mi-ran to regain consciousness for the next twenty years.

Yang Myung-cheol

Lee Sang-hoon

Soo-jin's father

Kim Ki-sub

Kong Gil-ho

Eun Gi-sang

Kim Sang-sik – Jo Seung-in's police senior

Choi Bok (fictional character)

Jang Sam-bong

Seo Chul-joong

Kang Dong-pal

Byung-soo

Go Eun-pyo

Lord Shim San

Kang-sook's true love