ปริศนาล่ารหัสลับ

Ji Chang-wook

Seo Jung-hoo

Yoo Ji-tae

Kim Moon-ho

Park Min-young

Chae Young-shin / Oh Ji-an

Park Sang-won

Kim Moon-shik

Do Ji-won

Choi Myung-hee

Woo Hee-jin

Kang Min-jae

Kim Mi-kyung

Jo Min-ja

Oh Jong-hyuk

Oh Gil-Han

Oh Kwang-rok

Ki Young-jae

Park Won-sang

Jang Byung-se

Taemi

Kang Dae-yong

Ji Il-ju

Seo Joon-Seok

Jang Seong-beom

Lee Jong-Soo

Jung Hye-in

Choi Myung-hee (young)

Park Sang-wook

Bae Sang-soo

Cho Han-chul

Yoon Dong-won

Son Seung-won

Kim Moon-Sik (young)

Song Ji-in

Jung-Hoo's mother (young)

Choi Seung-kyung

Reporter Yeo

Park Shi Jin

Seo Jung-hoo (young)