The full moon makes Wilf howl all night! The next morning, everyone is exhausted - and there's a boulder blocking Brian's door! He's the only one who knows how to stop Wilf's howling, so they need to budge that boulder.

Kitty wants a racetrack. For Cornelia, it's the perfect opportunity to prove she's the fastest builder... but she works too quickly and doesn't manage to get it right. Fortunately, the Piggy Builders know how to work as a team to give themselves a second chance.

Fred and Dana's door makes a squeaky sound, so they call the Piggy Builders to fix it. The Piggies decide to upgrade the entire door. They build the greatest door ever, but then forget how to open it.