Why: I know what you're thinking; another season 8 choice from Ardeospina? Yes! Yes indeed! I honestly don't care that it was a recent episode. I loved it! It was a fantastic mix of humor and angst, the Sam/Amelia storyline made huge progress, and Castiel was able to clear the air about where his head's at right now. Mix in cartoon physics, and you've got an instant classic!
Honestly, who didn't love Castiel's attempt at being a hunter? He so sincerely wanted to help that Sam and Dean couldn't say no. And even when his methods were on the unusual side, like interrogating a cat, the boys tried to help him along with as much grace as they could muster. Which wasn't often a whole lot, but they tried.
Favorite quote: Castiel had so many good lines in this episode that it's hard to choose just one. But that's my job, so I will go with:
Dean: What the hell happened?
Castiel: There was a pastry mishap.
Dean: Okay, and?
Castiel: And the frosting reached near-supersonic speeds.
(On page 3, sweetondean's #9)