Oh Eui-shik

Seok Jeong

Reporter Bong Du-hyeon

Nam Jae-woo

Kang Do-ha, National Forensic Officer and former Republic of Korea Air Force's EOD Captain.

Kim Soon-tae

Cha Min-ho, entertainment department reporter and Jo Ki-bum's ex-boyfriend (Ep. 6)

Ji Gyeom

Park Jung-woo, Du-sik's friend whom he met during college days.

Han Joon-woo

Oh Jung-bong — Joon-sun's action junior, a stuntman.

Gye Geun-sang, Gang-hwa's best friend.

Woo-seok (Ep. 9)

Hong Dong-min (Kang Dan-i's ex-husband)

Kong Hyuk-joon, Jin-shim's manager of ten years. He is very loyal and considers Jim-shim as his younger sister.

Kang Ha, Ha Rip's housemate.

Maeng Sam-seon (31)

Cha Hyun-joon

Oh Sang-sik, Joo-hyuk's friend who owns a noodle shop and works there alone

Hong Hae-sung (ko)

Lee Ho-tae

Bong Du-hyun (SBC reporter; Hong-joo's senior)

Choi Sung-beom – Sergeant, digital forensic expert

Choi Ji-woong