This episode aired on 11.18.2018. It's the final part of the show's anniversary. Team Jeju are all so freaking cute and they spend their last day with animals on the island. Team Paketu finishes their trek up the mountain and get a glimpse of Heaven Lake. The boys also get to visit an animal too.
Edit to add the last clip, I missed it earlier.
source: KBS World TV 1 2 3 4 5 6