Prime time soaps are often revered long after their runs on television have ended, as Dallas, Twin Peaks, and Beverly Hills 90210 readily demonstrate. Due to their profound impact, it's easy to forget how recently the genre itself was born. Dallas premiered in 1978, and was originally intended to air solely as a five-part mini-series. Then, in 1981, producer Aaron Spelling stepped in and introduced his own ultra-glitzy...