Kim Hee-sun
Kim's last drama was "Faith" (also known as "The Great Doctor"), his eighth and last collaboration with Song Ji-na. A fantasy epic about a 21st-century plastic surgeon who time travels to the Goryeo era and falls for royal bodyguard Choi Young, the series initially cast Lee Joon-gi and Kim Hee-sun as the protagonists. But Lee was drafted for mandatory military service, and he was replaced by Kang Ji-hwan, who then became embroiled in a legal dispute with his agency, and the role eventually went to Lee Min-ho. The casting changes stalled production for three years, and budget constraints forced Kim to modify his original plan to shoot in 3D. Given its budget and low ratings (around the 10% range), "Faith" was considered the biggest television flop of 2012.