Jerry, Elaine, George, and Susan set off to spend a weekend at a cabin owned by Susan's parents. Along the way, they end up making a stop so Jerry can meet a young fan who has a medical condition that confines him to a plastic bubble. Once there, George gets in a heated game of Trivial Pursuit with the boy. Meanwhile, the uninvited Kramer makes it to the cabin, where he decides to enjoy a cigar.
Brian Doyle-Murray guest stars as the bubble-boy's father, a Yoohoo delivery man. Originally airing October 7, 1992, "The Bubble Boy" was the seventh episode of the show's fourth season. ~ Matthew Tobey, All Movie Guide