인사이더

Kang Ha-neul

Kim Yo-han (1 episode)

Lee You-young

Oh Soo-yeon (1 episode)

Heo Sung-tae

Yoon Byung-wook (1 episode)

Kim Sang-ho

Mok Jin-hyung (1 episode)

Kang Yeong-seok

Jang Seon-oh (1 episode)

Park Seong-geun

Hong Sang-wook (1 episode)

Kang Shin-Hyo

Hong Jae-seon (1 episode)

Han Bo-Reum

Annie Stevens (1 episode)

Jeong Man-sik

Yang Hwa (1 episode)

Kim Si-eun

Park Ro-sa (1 episode)

Sung Ji-ru

Heo Sang-soo (1 episode)

Cha Yup

Kim Gil-sang (1 episode)

Yoon Byung-Hee

Kim Woo-sang (1 episode)

Um Chae-young

Oh Soo-yeon (Young) (1 episode)

Kim Joon-hyung

[Seongju Prison guard] (Ep. 5) (1 episode)

Lee Dong Won

[Seongju Prison inmate #1321] (1 episode)

Min Yeon-Hong

Director (1 episode)

Moon Man Se

Writer (1 episode)