Cast of Insider
Main cast
Kang Ha-neulas Kim Yo-han
Lee You-youngas Oh Soo-yeon
Heo Sung-taeas Yoon Byung-wook
Kim Sang-hoas Mok Jin-hyung
Kang Young-sukas Jang Seon-oh
Park Seong-geunas Hong Sang-wook
Kang Shin-hyoas Hong Jae-seon
Jeong Man-sikas Yang Hwa
Kim Si-eunas Park Ro-sa
Sung Ji-ruas Heo Sang-soo
Cha Yeobas Kim Gil-sang
Yoon Byung-heeas Kim Woo-sang
Lee Dong-wonas [Seongju Prison inmate #1321]
Moon Sung-keunas Do Won Bong [Seongju Prison inmate]
Heo Dong-wonas Yang Jun ['Skin Nation' chairman]
Choi Dae-hoonas No Seung Hwan / Nam Dae Moon [Seongju Prison inmate]
Han Jae-yeongas Jo Hae Do [Bukyeongpa gang]
Oh Tae-kyungas Woo Sang Ki [Goldman Casino's accountant / Min Ho's father]
Choi Mu-sungas Song Doo Cheol [Bukyeongpa gang]
Han Kyu-wonas Eom Ik Soo [Bukyeongpa gang]
Jo Hee-bongas Ryu Tae Hoon [Seongju Prison inmate]
Lee Ha-yulas Kim Woo Jae [Prosecutor]
Kim Min-seungas Woo Min Ho [Sang Ki's son]
Yoo Ha-bokas Kim Jung Gyu [Prosecutor]
Kim Byung-cheolas [Sinseondong elder]
Seo Myung-chanas [Sinseondong elder]
Lee Yang-heeas [Sinseondong elder]
Moon Jong-wonas Kim Sung Bum [Seongju Prison staff]
Park Joong-geunas Park [Seongju Prison guard]
Kim Kyu-baekas [Seongju Prison inmate #1369]
