My Little Pony: Friendship is Magic
Season 1 Episode 1: The Mare in the Moon

After trying to warn Princess Celestia about the return of the wicked Nightmare Moon, Twilight Sparkle and Spike travel to Ponyville. Under Princess Celestia's instructions, Twilight Sparkle goes to supervise the preparations for the Summer Sun Celebration and make some friends. There, they meet Pinkie Pie, Applejack, Rainbow Dash, Rarity and Fluttershy. However, Twilight is preoccupied with the impending return of Nightmare Moon from her thousand-year banishment. Nightmare Moon is returning...what will become of Equestria?