Just before Supernatural‘s season 8 premiere, EW hit the set of the CW show for a look at the world of the Winchesters. Among the stops on our tour? A room with the single largest collection of flannel shirts we’ve ever seen, a.k.a. the show’s wardrobe department. As assistant costume designer Dawn Grey explained, the three-story warehouse is one of two that the team maintains, and both are filled with iconic pieces from the show’s past.
In the video below, Grey gives us a tour, relives a few fan-favorite wardrobe moments (Dean’s coach outfit, Sam’s first non-flannel shirt) and highlights a few key pieces (Castiel’s coat!).
For more stories behind this year’s top TV and movie moments, click here for EW.com’s Best of 2012: Behind the Scenes coverage.