As jungle life takes its toll on Ed's expedition group, he decides to shake things up by mixing the pairings. Each of the kids inherits a new dad for the day. The dads must lead the way through the boiling heat of Mountain Pine Ridge to the top of Big Rock Falls, where together they must cross a towering waterfall across a jungle ravine. Jeff questions if he's been too hard on his son Akai, while Ben realises that he needs to bring the fun back into his family life and 12-year-old Dexter bonds with his dad Christian over their shared differences.