Plot: Nature Adventure Project No. 1 - Dolphin 114 Mission Briefing special guest: Junhyeon Dolphin-watching on land, sea, and air: Land Team - Kim Seung-woo, Kim Jong-Min Air Team - Sung Shi-kyung Sea Team #1 - Lee Su-geun, Joo Won Sea Team #2 - Uhm Tae-woong, Cha Tae-hyun Because only Sung Shi-kyung was able to see and document dolphins during the main trip, the production team decided to send back one cast member to Jeju every day until one of them sights the dolphins