
Gilligan discovers a jungle boy living on the island. He shows them a hole in the ground that causes objects to float, and the professor theorizes that it is expelling either helium or hydrogen. He immediately sets to work building a large balloon, with the hopes of carrying one of them back to civilization.
A hurricane is coming, so the Castaways must quickly build one large community hut in which to weather the storm. However, they soon get on each-others nerves, so they later decide to branch out and build individual huts.