The refrigerator in the main cabin was previously used in Season 2, Episode 16: Shawn (and Gus) of the Dead. In that episode, Shawn and Gus find the murdered security guard inside of it. See more
I don't like this, Shawn.
Well, your hands are a little bit tied, aren't they? Plus when you showed up I was hidding in a closet, so I figure I'm due to man up. If I'm not back in exactly four minutes, please go looking for me. But really start giving it some serious thought after two. And if you think that there is anything even slightly amiss after forty-five seconds, you're the leader, here.