Jo Jae-yoon

Park Dong-jin

Nam Cheol-woo

Jin Mu

Daniel Lee, a doctor of genetics and a criminologist

A comic performer in 'The End of the Earth Avengers' (Ep.7, 8, 14)

Lee Dae-chul, a death row inmate convicted of murdering Yoon Ji-sun.

An arcade worker in charge of the shooting game (Ep. 5 & 7)

Lee Man-jin

Shin Pil-goo

Woo Yang-woo

Ha Rok-hee's father

Hwang Jin-cheol

Oh Maeng-dal (42)

Shin Cheol-sik

Grim Reaper #007

Park Soon-jung / Cheetah

Han Ji-hoon – SWAT team leader

Claude Bong

Na Gil-tae, Geum Joo's client (episode 1)

Oh Chang-suk, Ryu Hae-sung's manager

Jin Young-soo (Chief Manager of Uruk Electric Power Corporation)

Kwang Jo (ep 11)

Mi-ran's husband (ep. 9)

Baemnun ("snake eye")

Woo Il-nam

Jo Dal-gu

Golta; the main antagonist in the series and a Yuan's eunuch.

Manager Hong

Ma Bong-chul – A local gangster whose life is spared by Kang-chi, and becomes loyal to him.

Police officer Kyung-chal

Cheol-gyeon

Park Yong-sik

Korean-Chinese taxi driver.

Yang Do-soo (ep. 1)

Photographer (ep. 3)

P.E. Teacher

Gal-chi

Kkak Jung-yi