- ??? - Yoon Sun
- Cho Seong-ha - Lee Chang-woo
- Lee Si-won - Secretary Yoon
- Shin Hyeon-seung - Lee Dong-rim
- Woo Hyun-ju - Ms Oh
- Go Yoon - Agent Park
- Choi Chan-ho - Agent Kim
- ??? - Manager Jeong
- Cho Dong-in - Manager Lee
- Jang Jin-hee - Special Agent Miss Lee
- Won Tae-min - Special Agent Mr. Han
- Lee Do-yeop - Special Agent Mr. Baek
- Ahn Bo-hyun - Kwon Min-jo
- Go Gyu-pil - Gong Dae-chul
- Yun Yoo-sun - Ha Young-shin [Woo-shin's mother]
- Ha-min - Lee Dong-rim's mother
- ??? - Prosecutor office deputy head
- Kang Hak-soo - Chief Yang
- Im Byeong-gi - Director Eun
- Jo Han-joon - [Undercover agent]
- Jung Young-hoon - Team A agent
- Heo Tae-hee - Prosecutor Han Min-soo
- Jang Ui-don - Jang Eui-don
- Han Sa-myeong - Team A agent Cha
- Jeon Kwang-jin - [Bomb squad captain]
- Song Hyeong-su - Jeweler
- Choi Mu-in - Im Deok-su [killer]
- Jo Hyun-wu - Song Soon-ho
- Yang Heung-ju - Warden Jeon Byung-gyu
- Kim Bi-bi - ARES Team Leader Lee Mi-young
- Park Ki-ryung - ARES CEO Kim Gun-ho
- Jang Tae-min - Detective
- Kim Do-yoon - Sergeant Ko Chul-min
- Park Seong-chan - Director Jung Hyo-gun
- Park Seung-woo
- Choi Tae-kang
Ji Sung hace el papel de Ha Woo-shin / Song Soo-hyun.
??? interpreta a Eun Hye-soo en la serie.
??? hace el papel de Kim Seo-hee.
??? hace el papel de Choi Tae-sung.
Oh Dae-hwan hace el papel de Team A Leader Lee.
??? interpreta a Chairman Kwon en la serie.
??? interpreta a Butler Kwon en la serie.
Choi Deok-moon interpreta a Kang Hyuk-pil en la serie.
??? hace el papel de Kwon Hyun-jo.
??? interpreta a Yoon Sun en la serie.
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