Even after all these decades, the scariest episodes of The Twilight Zone are still terrifying today. The Twilight Zone creator Rod Serling wanted to write TV shows about real-world atrocities like the murder of Emmett Till, but he struggled to get those scripts produced, because in the ‘50s and ‘60s, advertisers were very wary of the kind of content their clients’ ads were associated with. So, Serling found a clever workaround: he would allegorize real-world horrors like racism and the Red Scare through supernatural horror stories about aliens and monsters.