The Professor tells his fellow castaways that if they don't find a way to grow more oranges and other fruits on the island, they risk dying from vitamin deficiencies.
Did You Know?
It was Bob Denver's own son who played the little Gilligan in the dream scene. See more
The Professor says that the main problem is lack of Vitamin C. When Gilligan is telling Mary Ann and Ginger about their lack of vitamins, there is a pineapple sitting on the table. Pineapples have more than the minimum RDA of Vitamin C. See more
References The Wizard of Oz