Kim Won-hae

Choi Won-bong

Ryu Geun-deok

A homeless man

Seo Mun-chun

Polearm seller (Ep. 1)

Son Yong-rak: the head of his village.

Cho Ki-bong

Park Soo-moodang / Cha Sa-geum

Heo Gil-pyo, head of SMPA's Mobile Investigation Unit.

CEO Hwang

Do-pil / Ji Joon-gi

Antonio (Ep. 1)

Choi Go, editor-in-chief of 'Monthly House'.

Kim Hyeon-cheol

Ryu Seung-deok

Bartender (Ep. 8 & 16)

Jung Se-joon

Cheon Man-shik Park Sung-joon as young Cheon Man-shik

Park Choong-chae

Depressed widower (Ep. 7)

Nam Sung-hwan

Vladimir Gozhaev

Kwon Hyeon-seok - Administrator of Geosung Hospice, Kwon Min-Seong's father.

Kong Soo-rae, a coffeehouse owner and I-gyeong's boss.

A mayor

Math teacher

Old Dong-sik (49)

Prosecutor Jang In-gyu

Gil Gong-tae, Oh-sol's father. A district cleaner.

Han Sang-seop, a local private investigator and chief of a detective agency.

Yoon Suk-ho (Sim-deok's father)

Station Manager Jo In-ho

Mortician (Ep. 1, 3, 8)

Kang Jae-sik

Kim Jung-soo, a doctor (Ep. 13)

Park Tae-hee

Lee Dong-soo

Oh Dol-ppyeo

Na Gwang-gyun / Crazy Dog

Kim Yong-cheol, the serial killer also known as The Reaper.

Kim Gye-chul

Woo Reuk (Ep. 1–3, 6, 8–10, 15)

Min Byung-ho

Son Se-woon

Han Young-suk, director of Comfo Company

Department head Jo Won-hae

Park Chang-min (44)

Eunuch Hong