Beverly Hills 90210 " was a cleaning soap opera about affluent teenagers at a posh California high school. It debuted in 1990 and its 10-season run perfectly bookended the decade. Ask anybody who grew up within the '90s who Brenda and Dylan have been, and you will certainly get a passionate reply. The show handled topical issues like drug use, teen suicide, and abortion. Still, its breezy peek into the lives of privileged teenagers gave method to exhibits like "Gossip Woman" and "The O.C. Whereas "Buffy the Vampire Slayer's" run extended beyond the '90s, it debuted in 1997, and the...