Look, if this doesn't make you ship Cas x Pilar, I don't what will.

I read this after I read "Rio Gets a Puppy" and had a total blast - it definitely filled some of the characterization cravings I had been stuck with following Null Set, while still keeping everyone in character. It also provides a solid foundation for those moving on to Critical Point (though I'm not quite sure how this story fits in to the Cas Russell series vs. the Russell's Attic series).