My Little Pony: Friendship Is Magic

Season 2, Episode 2

Episode Title: The Return of Harmony (2)

Air Date: 2011-09-24

Overview:

Twilight's friends have been corrupted by Discord, and all of Equestria is about to fall into total chaos. Twilight remembers about the riddle of finding the stolen Elements of Harmony. However, even after obtaining them, can she and her friends defeat their most powerful foe yet with almost all hope lost?