Each member takes one of the characters from the classic Chinese novel “Journey to the West” as they go to different destination every season.
In Season 5, Kang Ho Dong, Eun Ji Won, Lee Soo Geun, Ahn Jae Hyun, Mino, and P.O travel to Hong Kong and Hokkaido. A totally new set of characters; Chucky, Kaonashi, Dracula, Chinese Zombie, Grim Reaper, and Virgin Female Ghost, are introduced for Hong Kong and farmingtheme; watermelon, pear, farmer, peach, gassault, and sprouts, for Hokkaido.
(Source: Wikipedia)