A giant scientist experimenting with cloning technology succeeds in cloning Valerie and Barry. These are returned to the camp -- where they prepare a booby trap to kill the rest of the earthlings.

While stealing firecrackers, Barry and Valerie take refuge in a giant child's balloon, which is cut loose. Mark and Steve hop in, and the balloon is inexplicably drawn west, against the wind and across the 'Sea of Storms'. Dan and Fitzhugh can only listen helplessly as the rest of the group is drawn out of range.