Once again Empress Ki was the clear winner in the Monday night ratings, attracting 20.8 percent of the viewers. There was plenty of drama in the latest episode with Ha Ji Won's character giving birth in a cave, almost losing her life and finding the blood vow.

Ha Ji Won, who plays Seungnyang called the birth scene the hardest thing she has ever filmed and said she almost passed out.

"I had to do the scene in a block of ice," said Ha Ji Won. "My whole body went numb and I felt like I was turning into ice."

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