On the most recent episode of the MBC entertainment program 'Infinite Challenge,' which aired on December 20, 2014, the Infinite Challenge members recruited Kim Jung Nam of the popular 1990s group Turbo for their 'Saturday Saturday Is a Signer' performance. They had been preparing for the stage performance with a lineup of popular singers from the 1990s. On this day's episode, the Infinite Challenge members welcomed Kim Jung Nam of Turbo. Kim Jung Nam had been a member of the two men boy group Turbo with Kim Jong Gook. He shared episodes with Kim Jong Gook on this day, and how they reunited after 15 years. He then showed off his dance skills, and made the Infinite Challenge members laugh. In related news, on the most recent episode of the popular MBC entertainment program 'Infinite Challenge,' the members recruited popular singers from the 1990s and hosted a stage performance, showing popular songs from the 1990s. The popular 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.