Do Princesses Dream of Magic Sheep?

Do Princesses Dream of Magic Sheep? is an upcoming episode of My Little Pony Friendship is Magic. It is the thirteenth episode of the fifth season and the one hundred and fourth episode overall. The title is a play on the 1968 science fiction novel Do Androids Dream of Electric Sheep? by Philip K. Dick.

Princess Luna orders the Mane Six to hunt down a magical force that turns dreams into nightmares.

From Zap2it
"Princess Luna enlists the Mane 6 to search for and locate the Tantabus, a magical force that threatens to turn the dreams of every pony into nightmares."