Our inaugural celebration of the most powerful people in unscripted television. “It was a fresh take on something nostalgic.” Photo-Illustration: Vulture; Photo: NBCUniversal Reality TV’s Cambrian moment was the debut of Big Brother , the first series to involve both 24/7 surveillance and audience-determined eliminations. Corie Henson, the former chief of unscripted at NBC and the current president of Beast Industries Studios, was a supervising producer at CBS at the time and witnessed the