Chicago

Chicago is a city in the U.S. state of Illinois.

Season 1
The boys arrive in Chicago to investigate recent violent deaths. Disguised as operators from a security alarm company, they visit the apartment of the last victim, Meredith, who was ripped to pieces as if by a wild animal. They discount werewolves due to it being the wrong time of the lunar cycle, and struggle to find clues until Dean notices that the blood spatter on the carpet forms a symbol. Sam and Dean also found Meg in a bar of city. ("Shadow")

Appearances

 * Season 1
 * Shadow