The popular MBC entertainment program 'Infinite Challenge' members Yoo Jae Suk and Jung Hyung Don turned out to be the best couple of the episode. On the recent episode of the MBC entertainment program 'Infinite Challenge' titled 'Infinite Challenge - Begin Again' members Yoo Jae Suk and Jung Hyung Don, who were identified as the closest friends out of the six members, paired up and decided to go to Busan. They got on the car and on the highway to Busan. Yoo Jae Suk and Jung Hyung Don had a fun time in the car singing and excited about their day trip, but soon got tired because of heavy traffic. However, Yoo Jae Suk and Jung Hyung Don still showed off their friendship throughout the episode. In related news, the popular MBC entertainment program "Infinite Challenge," which recently aired its 400^th episode, features the Infinite Challenge members Noh Hong Chul, Ha Ha, Park Myung Soo, Yoo Jae Suk, Jung Joon Ha, and Jung Hyung Don, who play survival games every week on different topics.