'Great Doctor' Kim Hee Sun threatened Park Yoon Jae with a knife.
On October 19th, in the 18th episode of SBS's Monday-Tuesday drama 'Great Doctor', Yoo Eun Su (played by Kim Hee Sun) shouted at Deok Heung Gun (played by Park Yoon Jae), who had come to see her. As he attempted to approach her, she yelled, "You will never become king!"
Deok Heung Gun desperately needed Ki Chul's help to usurp King Gong Min (played by Ryu Deok Hwan) and steal his throne. However, Ki Chul wanted to take Yoo Eun Su away for himself. If Ki Chul took Eun Su away from him, Deok Heung Gun would be unable to order Ki Chul as he pleased.
As he got closer, Yoo Eun Su pulled out her knife and put it against Deok Heung Gun's neck. She threatened him and said, "I have learned how to use a knife." After she created some space between herself and Deok Heung Gun, she said, "This is as far as I've learned. I don't want you to come any closer."
Deok Heung Gun asked Yoo Eun Su to just hide for 10 days. He explained, "In that time, a Royal letter from Yuan will come and then, I will be the king of Goryeo."
However, Deok Heung Gun did not let Eun Su go so easily. He made sure she could not go far by poisoning her with a poisonous tick.