Ten years prior to Mad Men's pilot, The Simpsons' Principal Skinner did the exact same thing. At a party celebrating his 20th anniversary teaching, a man claiming to be the real Seymour Skinner shows up and accuses the principal of being an impostor. As it turns out, Skinner was once a young gutter rat named Armin Tamzarian (still a better name than Dick Whitman). Armin found himself fighting in the Vietnam War under a commanding officer named ... Seymour Skinner. After the real Sergeant Skinner was presumed dead, Armin took over his identity, and you know the rest. Anyway, that's how the least sexy character on The Simpsons inspired the most sexy character of the 2000s.