Secret Door
A re-imagining of the legendary tale of the troubled father-son relationship between King Yeongjo and his only son Prince Sado. While his father insists on a strong and centralized government, Crown Prince Sado promotes social justice and equality throughout the kingdom. Throughout eight fateful years, the strain on their relationship — both familial and political — eventually evolves into a total breakdown, ending with one of the most tragic stories in Joseon history.
Top cast
Lee Je-hoonCrown Prince Sado
Kim You-jungSeo Ji-dam
Yoon So-heeSeo Ji-dam / Park Bingae
Han Suk-kyuKing Yeongjo
Park Eun-binLady Hyegyeong
Kim Min-jongNa Chul-joo
Lee Won-jongPark Mun-su
Kwon Hae-hyoSeo Kyoon
Jeon Kuk-hwanLee Jong-sung
Jang Hyun-sungHong Gye-hui
Uhm Hyo-seopMin Baek-sang
Kim Ha-kyoonKim Sang-ro
Below are the streaming services currently carrying the TV show “Secret Door” in Canada, along with how each offers it (subscription, buy, or rent) and a direct link. Licensing differs by market, so availability in Canada can differ from other countries.
Where to watch Secret Door in Canada
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Not currently available on the supported providers in Canada.
Availability can change as licenses rotate — confirm on the provider’s page before subscribing. Last checked: 1 Sept 2026.