Mummy Pig makes Peppa a special box to put secret things in. Peppa loves secrets. George is sad because Peppa won't tell him what's in the box. When George gets his own secret box, and Peppa can't guess what's inside, she decides she doesn't like secrets as much as she used to.

Cast: Lily Snowden-Fine, John Sparkes, Richard Ridings, Morwenna Banks, Oliver May, Alice May