Due to his busy schedule with his current drama role in 'Sungkyunkwan Scandal', it was decided that actor Song Joong Ki will only appear on variety show 'Running Man' once every other week. An associate of 'Running Man' revealed, "Because of the clashes between Song Joong Ki's drama filming and 'Running Man', he will instead come on every other week." The actor was able to participate for all of his original duties on 'Running Man', as filming only occurred once every two weeks, and therefore did not clash with his drama. However, 'Running Man' recently changed their schedule to film every week. After this, it became quite difficult for Lee Joong Ki to adjust his own schedules to film for two different shows. Meanwhile for this week's episode of 'Running Man', the cast will not be hosting a guest celebrity, and instead the 8 MCs will be seen 'running' around the Seoul Sports Complex. Source + Photo: Star News