My Little Pony: Friendship Is Magic

Season 2, Episode 1

Episode Title: The Return of Harmony (1)

Air Date: 2011-09-17

Overview:

The peace of Equestria is threatened when Discord, a mischievous spirit of disharmony, escapes from his imprisonment in stone. Twilight and her friends must defeat him using the Elements of Harmony. If only they can find them!