Actor Ko Kyung Pyo shared that he is a big fan of Yoo Jae Suk, who is a member of popular entertainment programs such as the MBC entertainment program 'Infinite Challenge' and SBS entertainment program 'Running Man.' Ko Kyung Pyo posed last week on his Instagram, "Infinite Challenge lunar New Year festival!" with a picture of his nametag on Infinite Challenge, showing that he is also a big fan of the program. In related news, on the most recent episode of the popular MBC entertainment program 'Infinite Challenge,' the members chased one another for the mystery prize in the wooden box. The second part of the mystery box episode will air this Sunday. The MBC entertainment program 'Infinite Challenge' is one of the popular, long lasting entertainment programs in Korea. It features the Infinite Challenge members Ha Ha, Park Myung Soo, Yoo Jae Suk, Jung Joon Ha, and Jung Hyung Don.