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Secret Door: Season 1, Episode 17 - Episode 17 (2014)
Prince Sado returns to the regency and sets out to make the country a better place for all classes.
Lee Je-hoon
as Crown Prince Sado
Kim You-jung
as Seo Ji-dam
Yoon So-hee
as Seo Ji-dam / Park Bingae
Han Suk-kyu
as King Yeongjo
Park Eun-bin
as Lady Hyegyeong
Kim Min-jong
as Na Chul-joo
Lee Won-jong
as Park Mun-su
Kwon Hae-hyo
as Seo Kyoon
Jeon Kuk-hwan
as Lee Jong-sung
Jang Hyun-sung
as Hong Gye-hui
Uhm Hyo-seop
as Min Baek-sang
Kim Ha-kyoon
as Kim Sang-ro
Choi Won-young
as Chae Je-gong
Seo Jun-young
as Shin Heung-bok
Ha Seung-lee
as Queen Jeongsun
Park Hyo-ju
as Woon-shim
Kim Tae-hun
as Kang Pil-jae
Jeong Gyu-su
as Yang Soon-Man
Kwak Hee-Sung
as Kim Moo
Jo Woo-jin
as Lee Dal-seong
Kim Woo-seok
as Lee Seon [Young] / Lee San [Young]
Lee Won-jae
as Kang Seo-won
Kim Hyun
as Jang Hwa Won
Kim Chang-wan
as Kim Taek
Son Byung-ho
as Kim Sung Ik
Lee Je-hoon
as Crown Prince Sado
Kim You-jung
as Seo Ji-dam
Yoon So-hee
as Seo Ji-dam / Park Bingae
Han Suk-kyu
as King Yeongjo
Park Eun-bin
as Lady Hyegyeong
Kim Min-jong
as Na Chul-joo
Lee Won-jong
as Park Mun-su
Kwon Hae-hyo
as Seo Kyoon
Jeon Kuk-hwan
as Lee Jong-sung
Jang Hyun-sung
as Hong Gye-hui
Uhm Hyo-seop
as Min Baek-sang
Kim Ha-kyoon
as Kim Sang-ro
Choi Won-young
as Chae Je-gong
Seo Jun-young
as Shin Heung-bok
Ha Seung-lee
as Queen Jeongsun
Park Hyo-ju
as Woon-shim
Kim Tae-hun
as Kang Pil-jae
Jeong Gyu-su
as Yang Soon-Man
Kwak Hee-Sung
as Kim Moo
Jo Woo-jin
as Lee Dal-seong
Kim Woo-seok
as Lee Seon [Young] / Lee San [Young]
Lee Won-jae
as Kang Seo-won
Kim Hyun
as Jang Hwa Won
Kim Chang-wan
as Kim Taek
Son Byung-ho
as Kim Sung Ik
