Supernatural really only has two stars—Jared Padalecki and Jensen Ackles. Sure, they have a small group of regular supporting characters who fans have come to know and love just as much as the boys, though maybe in different ways for many of them. But if you were to remove Sam and Dean from the equation, there'd be no show left to salvage.
A few seasons ago, Supernatural flirted with this concept briefly—first in their special “Ghostfacers” episode, which really put a group of wannabe ghosthunter kids and their hand-held cameras at the center of the story, and then in season six with “Weekend at Bobby’s,” to get a glimpse into one of those beloved supporting characters’ lives when the boys weren’t around. But now the show is playing with the concept even further in “Bitten.”