Through the Darkness [Russian]

Kim Nam-gil

Song Ha-Young

Jin Seon-kyu

Gook Young-Soo

Ryeoun

Jeong Woo-joo

Kim So-jin

Yoon Tae-Goo

Dae-yeon Lee

Baek Joon-sik

Gong Sung-Ha

Choi Yoon-ji

Kim Hye-Ok

Park Yeong-sin

Joong-hee Kim

Nam Gi-Tae

Na Chul

Woo Ho-seong

Ko Gun-Han

Yang Yong-chul (Man claiming to be the 'Red Cap Case' murderer)

Lee Chun-moo

Song Ha-yeong (Young)

Noh Ha Yeon

Lee Soo-hyeon (Murder victim)

Yoon Ga Yi

Lee Cho-won (Geumchan Village woman)

Kwon Eun-sung

Lee Ji Wook [Soo Hyun's brother]

Hee-Jun Oh

Kang Gyu-min

Lee Ye-Joo

Christmas Tree girl

Dong-kyu Lee

Anchorman

Lee Jae-woo

Detective Kim