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The cast traveled back in time to the Josen Dynasty as well as the 1960s as they go on a mission to save Chun Song Yi. Kim Hyun Soo, who plays the younger version of Chun Song Yi, also made a surprise guest appearance.

Do Min Jun will battle the villians who come in his way with his supernatural powers to save Chun Song Yi, making this a 'Running Man' race you won't want to miss!

Now the question is who will play Chun Song Yi and Do Min Jun? Check back in with allkpop this weekend to find out! In the meantime, brace yourselves as you check out the stills and BTS photos!