On the most recent episode of the MBC entertainment program 'Infinite Challenge,' which aired on December 20, 2014, the Infinite Challenge members recruited 1990s pop stars including Kim Jung Nam of the 1990s boy group Turbo. Kim Jung Nam on this day's episode showed off his comical sides, joking about his days after working as Turbo with Kim Jong Gook. He said while singing Kim Jong Gook's part in their old song, "This is Jong Gook's part. Please excuse me if I am not as good as him." In related news, on the most recent episode of the popular MBC entertainment program 'Infinite Challenge,' called 'Saturday Saturday Is a Singer,' the Infinite Challenge members recruited popular singers from the 1990s and hosted a stage performance, showing popular songs from the 1990s. 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.