S03E04: 'Sin City'

Sam and Dean investigate a rash of violent deaths in Elizabethville, Ohio, a once-sleepy town that has been turned into a haven for gamblers and drinkers.

Dean discovers demons have infiltrated Elizabethville and are using their powers of persuasion to make the townspeople succumb to their basic instincts.

Meanwhile, Ruby helps Bobby rebuild the Colt from scratch and stuns him with some news.