The MBC entertainment program 'Infinite Challenge' member Jung Hyung Don was absent for a part of the episode because he was sick with pneumonia.

On the most recent episode of the popular MBC entertainment program 'Infinite Challenge,' which aired on October 2, 2015, Jung Hyung Don did not show up for the part of the episode because he was sick with pneumonia and had to rest. During the second to last part of the episode, Yoo Jae Suk announced that Jung Hyung Don was sick and could not make it to the filming scene. Yoo Jae Suk asked the other members if they had called to see how Jung Hyung Don was doing. Park Myung Soo replied, "I have not," and made others laugh at his incredulous comment.

On the first half of the episode, the six members teamed up in three pairs. Ha Ha and Kwanghee, Park Myung Soo and Jung Joon Ha, and Jung Hyung Don and Yoo Jae Suk became teams and brainstormed for ideas. The three pairs presented two to three ideas for the future MBC entertainment program 'Infinite Challenge' episodes. In related news, 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.