Broadcast Date: 2016-09-11 (filmed on 2016-08-29)
Location: Honam High Speed Railway Depot (Sanjeong-dong, Gwangsan-gu, Gwangju)
Description: Running Man are told they can go anywhere on a train and are asked to write down where they'd like to go. Suddenly guards come out and force them to write down "Prison". They have to face a unique challenge per carriage on the train. If they fail, they are sent to prison.