Yoo Jae-myung

Kim Guk-ho

Jang Doo-sik

Choi Chung-soo

Noh Young-guk, director of the Judicial Research and Training Institute.

Unknown person

Um Joon-gi, an assemblyman

Na Il-deung's father Na Ji-man

Choi Hyung-in, a veteran violent crime detective with fifteen years of experience who is living in misery after losing his wife to a horrific terrorist crime.

Hong Yoo-chan (eps. 1-3)

Jade Emperor (voice only)

Jang Dae-hee Choi Min-young as young Dae-hee

Gi Choon-ho

Joo Kyung-moon

Yang Kyung-mo

Lee Chang-joon (season 1; guest season 2)

Je-hyuk's lawyer

Kim Geun-deok, In Hee's brother

Pa-oh

Jo Dong-kyu, President of Lovely Cosmetic

Noh Seung-chan.

Son Dong-ho – Lawyer.

Ryu Jae-myung A dean at the local boys high school and biology teacher, he previously took Mathematics Education at the Teacher's College of Pusan National University in Busan, Gyeognam but transferred to the Biological Education Department. He becomes a tutor due to earn extra cash. Jae-myung once harboured dreams of becoming a dancer when he visited a dancing club at USFK's Busan Naval Base. Now focused on shaping the men of the future, he does his best to keep his son in check while still enjoying life.

Department head Im.

Factory worker (ep. 16)

Seon-woo

The killer (ep 15)

Min Seo's father