After going through the Pie family records, it turns out that Pinkie is Applejack's fourth cousin twice removed by a fifth cousin. This marks the start of a new relationship between the two families.
A thousand years ago, Princess Luna becomes overcome with negative emotions, and one day finds herself unable to control her own body. Her mind intact, she has to deal with whatever's taken control of her.
After a particularly rough day, Twilight accidentally activates a spell she read earlier but didn't understand. She wakes up the next morning in darkness. Her only chance is to find Princess Celestia to return Equestria to how it is supposed to be.
Temple Scrivener set out with his anthropology crew to study the native culture of the wild plains dogs of The Golden Plains. En route he accidentally has First Contact with a new dog tribe that seems less and less canine as time goes on.