This document discusses the theme of the double in Robert Louis Stevenson's Dr. Jekyll and Mr. Hyde and Mary Shelley's Frankenstein. Both novels tell stories of scientists who try to surpass human limitations through creation of life without responsibility. Frankenstein features two complementary characters, the doctor and his monster, while Jekyll and Hyde features one person with two personalities. Unlike Frankenstein's creator, Jekyll fully enjoys experiencing his dual nature, though both works show the creators being destroyed by their own creations.