17. Maddy Ferguson
One of Twin Peaks' many meta-references to network-television Velveeta of ages past, Maddy was The Patty Duke Show-style identical cousin of Laura Palmer. And her amateur sleuthing alongside Donna Hayward and James Hurley was pure Scooby Gang shenanigans long before Buffy the Vampire Slayer took a stab at it. But this dark-haired doppelganger is also an outgrowth of Lynch's obsession with blonde/brunette duality (see Lost Highway, Mulholland Dr.) and its obvious inspiration, Hitchcock's Vertigo. Most importantly, she gave the formidable actor Sheryl Lee a living, breathing character to inhabit – and an on-screen death scene that remains the pinnacle of televised horror.