When a fun and peaceful one-day vacation tour goes horribly awry on next week's 'Running Man', the cast and guests must hurry to solve the mystery - who is the vengeful traitor hiding in their midst?

This week's guest list will carry over into next week, giving fans one more episode with�A Pink's�Bomi�and�Na-Eun,�Joo Ji Hoon,�Heo Kyung Hwan,�Ji Sung,�Baek Sung Hyun,�Sam Otswiri,�Fabien Yoon�and�Cha Yoo Ram!

Check out the preview below.