What can I say about The Return of Harmony that hasn't already been said?  It's a real game changer for MLP.  It brought us a story that showed just how close the Mane Six came to losing everything.  It gave us some impressive new visuals and hilarious bits of comedy.  And of course, we are introduced to Discord, the only character throughout MLP who could possibly be any more chaotic and unpredictable than Pinkie Pie.

DRWolf Narrator by DavionX:
http://davionx.deviantart.com/art/DrWolf-Narrator-377863090

All other Characters and Images belong to Hasbro.