The Twilight Zone’s terror successfully bypassed television censorship of the 1960s with speculative fiction. Over five seasons, Serling, as host and writer, examined science, superstition, prejudice, and identity. While there's no dearth of scary Twilight Zone episodes, such as “Eye of the Beholder” and “Nightmare at 20,000 Feet,” one particular season 3 episode truly manages to go under the skin in ways that fans of modern horror won’t be able to shake.