The One Where Pinkie Pie Knows

The One Where Pinkie Pie Knows is an upcoming episode of the fifth season of My Little Pony Friendship is Magic. It is the nineteenth episode of the fifth season and the one hundred and tenth episode overall. The episode title is modeled after the nondescript episode titles of the 1994 sitcom Friends.

Production and development
The episode is written by G.M. Berrow, the author of the My Little Pony Friendship is Magic chapter books. Berrow first announced her involvement with the show at BronyCon 2014. At BronyCAN, it was revealed that it will be a Pinkie Pie-centered episode. On November 5, 2014, Sabrina Alberghetti tweeted that she was storyboarding this episode.

From Zap2it
"Pinkie Pie struggles to keep a secret that involves Princess Cadance and Shining Armor."