Yunjin Kim at The ABC Upfront Presentation 2006 at the Lincoln Centre. New York City, USA - 16.05.06

Actress YUNJIN KIM, who plays SUN in the popular series, admits she only get scripts for the show, which is famed for its mysterious storylines, a day before shooting.

She says, "It's a real life MISSION: IMPOSSIBLE scenario.

"If a huge secret is about to be revealed they blank the lines out of our scripts. We have to call the producers, sometimes only a day before shooting, to get our lines"

Source: WENN