There are filler episodes and then there are episodes like this where they take a break from saving the world. It's taking one step further as far so boring episodes go. The Winchester Brothers don't have the privilege of taking a break, nor does their audience care to watch them do it either.
I can deal with filler episodes because those are monster of the week episodes with, usually, an interesting twist. I'm not sure what they were thinking with this one. Of course they were going to run into something that goes bump in the night, but the introduction to the story was weak.
The one thing that saves it from being an atrocity is the comedy, which this episode has a little more than usual.