Through a misunderstanding, Mokey becomes the new Trash Heap.

Wembley tries to take care of a baby Tree Creature when its egg falls down the well and into the Fraggle Pond.

Sprocket gets stuck in the hole between Outer Space and the Rock and Gobo has to help him.

While camping far from home, Mokey and Red discover a band of Fraggles who are humorless and cruel. After Mokey is captured, both sides get ready for war!

Gobo's come down with the Pebble Pox, so it's up to Boober and Wembley to go to the Cave of Shadows to get Gobo's cure. However, Boober's not too fond of the idea, and shares his worries with Wembley along the way. Before long, Wembley comes up with a bad case of the Pebble Pox, too. Will Boober leave his sick friend behind and ditch the journey, or will Boober put his germ-worries aside to help his friends?

When the Architect Doozer is teaching some younger Doozers about the great Doozer king (who looks a LOT like Gunge) Gunge wanders in the middle of the teaching session while looking for the M'Geecky vines for Marjorie. The Doozers think he's their long lost king, which makes Philo jealous, and he convinces the Doozers that the king isn't Gunge, it's Philo. Their friendship is divided, but the Trash Heap later reminds Philo that friendships last much longer than all the riches in the world.

Wembley loves the annual Duetathon — a contest in which Fraggles sing duets. But the entire Rock is dumbfounded to learn who Wembley chooses as his singing partner.

Gobo doesn't believe he has an "inner voice" so he doesn't heed the warning that he, Sprocket and Wrench Doozer might be in danger.

On his first solo overnight hike, Wembley meets Mudwell the Mudbunny, whose behavior first entertains, and then confuses him.

The leaves of the Nirvana tree have fallen, and it's time for Junior Gorg to become king, but not until he has a chance to get a different perspective on the Universe.