Kim Tae-woo
On the August 27th episode, it was announced that Kim Tae-woo will be taking a temporary leave of absence due to a surgery he is to receive for his throat. He vowed to come back to the show as soon as he makes a full recovery. Starting episode 44, Song Eun-i filled in as a semi-permanent MC in Kim Tae-woo's absence. On December 8, 2010, it was revealed that "Invincible Youth" finished recording their finale episode. They had filmed for over one year, since October 2009.