1x10Swarm of the Century Episode Summary Aired: Friday December 17, 2010
Princess Celestia is coming to visit, and everyone in Ponyville is making sure everything is perfect for her arrival, especially Twilight. Unfortunately, trouble arises when a swarm of parasprites, adorable insects with ravenous appetites, invades the town. And they are multiplying by the second! Pinkie Pie claims to have a solution to this problem, but no one really knows why she is gathering various musical instruments to do it.