A 14-year-old Kurt Russell guests in this episode as an elusive and resourceful "jungle boy" who has made his home on Gilligan's Island. At first unable to convince any of his fellow castaways that the Jungle Boy exists, Gilligan (Bob Denver) finally manages to bring the monosyllabic stranger out in the open. Helpfully, Jungle Boy leads the castaways to what appears to be a large deposit of helium--whereupon the Professor (Russell Johnson) declares that they might very well be able to float off the island in a jerry-built balloon. ~ Hal Erickson, Rovi