Doc still doesn't believe Sprocket when he says there's furry creatures behind the hole in the workshop. So Sprocket finally makes his way into Fraggle Rock to find Gobo, and causes all kinds of mayhem. When he runs into the Doozers, the Doozers hire him to knock down all their buildings so they can rebuild. But Boober seems to be allergic to Sprocket, so when the Fraggles find out the Hairy Monster is in Fraggle Rock, they use Boober to find him. Sprocket finds his way out into the Gorg's Garden, and even meets the Trash Heap. But when Gobo gets caught by Junior, Sprocket and Gobo must work together to get Junior to let him go, so Gobo can take Sprocket back home.
Wembley's got a special talent; he can hear water in the rock walls. But when Gobo and Red don't believe him, he sets out to prove he's right. When water finally breaks out, the Fraggles discover that this type of water is special. But when the water starts to cause rock quakes and Gobo falls into the cracks, is it finally time to shut down the fun?
When Boober shows Wembley all of his ointments and medicines, Wembley thinks Boober doesn't have enough fun, and invites him to the garden to play Follow the Leader with the rest of their friends. First Boober accepts, but then he overhears Gobo talking about Boober being a big goof (when really, Gobo's referring to Junior), he gets upset and very hurt, and decides to let Sidebottom out and turns into "Dr. Fun." The other Fraggles worry that Boober's going too far, but when Boober hypnotizes Junior into thinking he's a Fraggle, the fun begins. Then Wembley starts to have an allergic reaction to the Bonkleberry stew, and the situation becomes problematic, and it's time for Dr. Fun to step aside before it's too late.
Uncle Matt's coming back home again, and this time when he shows up, he hides under the party table in Gobo's room to avoid what he calls "Face Erasers." Red pokes fun at Matt's cowardice, even when he says it was a joke. Gobo gets upset that Matt won't admit his fear, so Matt goes exploring by himself. When Wembley convinces Gobo to go after him, they find a scary wooden statue of a Fraggle. When Matt accidentally hits it, they both fall through the floor and happen upon a whole new cavern with dozens of tunnels. And when you hit the arch to the tunnel, you get sucked into another region of "Outer Space", thus providing new places for Gobo and Uncle Matt to explore.
Tonight is the night of the Blue Moon, and when Junior Gorg notices this, he begs Pa to let him play the Royal Kazoo to prove that he'll be a great, worthy king. But the moon needs to be full, and one also needs five Fraggle witnesses. But when Pa dismisses the idea in fear of Junior being banished, Junior feels like he'll never be much of anything. Then, when Cantus the Minstrel shows up (as a shadowy figure), he convinces Junior that he needs to believe in himself and that he can do anything he wants to. Cantus makes Junior promise to play the Royal Kazoo, and then Cantus goes to get the five Fraggle witnesses; Gobo, Mokey, Red, Wembley and Boober. Once they show up, it's time for Junior to prove what kind of king he'll be.
It's time for the Duet-athon! Wembley's supposed to be paired up with Gobo, but when Matt comes back home for another visit, Gobo gets paired up with his uncle instead. Then Wembley tries to get Boober to join him, but when Tosh Fraggle comes along, Boober just can't resist doing a song with his crush. Wembley becomes sad, and thinks no one wants to be with him in the Duet-athon. While Wembley's crying, Cotterpin Doozer comes along and tries to cheer him up, saying she'll be in the competition with him. When Wembley then goes to Gillis Fraggle to sign her up as his partner, Gillis rudely tells him Doozers are not allowed in the contest. Wembley goes back and delivers the bad news to Cotterpin, saying she can't be in it with him. She gets mad and leaves, prompting Wembley to stand up to Gillis, telling him that just because the Duet-athon has always been just for Fraggles, it doesn't make it right. He starts up a protest rally, and before long, all the Fraggles say that if Cotterpin isn't allowed to join, they'll all drop out, leaving Gillis no choice but to do the right thing... leading to the greatest Duet-athon ever
One day as Wembley and Boober are going down by Roaring Rivene, they come upon a huge collection of colorful smoothies and rollies, the greatest gift you can give to a Fraggle. But then, something even more amazing happens; Wembley spots the Perfect Blue Rollie, the rarest pebble in the universe. He gives it to Boober in the spirit of giving. But Boober becomes selfish with the rollie and puts it in his Hidey Hole, a cave where Boober keeps all of his stuff. When Gobo, Red and Mokey see it, they do their best to get Boober to bring it to the Great Hall and have a party. Boober becomes even more selfish, kicks his friends out, and spends his time protecting the rollie from being stolen. But when Wembley unsuccessfully sneaks in as a ball of laundry lint to steal it back, a cave-in occurs, leaving Boober inside. It's up to his friends to save him before Boober becomes trapped forever, with all his 'stuff.'
Mokey's well-known for being a terrific painter, but when Red takes down one of her paintings and puts up one of Pedley Fraggles' (another great painter), she sets out to show everyone how much better of a painter she is. When she goes to the Trash Heap for a paintbrush, Marjorie gives her a magical paintbrush that, when used for the wrong reasons, takes control of the Fraggle using it. Mokey doesn't consider herself the jealous type, but she's proven wrong when she tries to out-paint Pedley and she can't seem to let go of the brush. Mokey needs to find a way to get the brush to quit controlling her, and realize why she loved painting in the first place.
When Wembley rescues a Spider Fly from a Snare Blossom, the fly turns into a strange old creature that will grant Wembley any wish he wants to for setting him free. Wembley decides he wants to fly, so the creature gives him the ability, but Wembley's only allowed to fly three times. He uses his first time up almost immediately, but then he goes to find his friends to show them his new ability. Wembley's story isn't quite believable to his friends, which upsets Wembley because everyone else gets to show off what they're good at. He decides he's going to fly for the Fraggles who will believe him... so he seeks out Feeny, Marlon, and Large Marvin to show them his flying abilities. But Gobo, Mokey and Red stop him from doing so because they believe he'll just hurt himself. Finally, he decides that showing off for his friends isn't what he wanted the flying abilities for; he wanted to fly just to fly.
Red's been playing "Princess Gwenelot and the Evil Dragon" lately, and when Gobo tells her she needs to grow up and stop playing make-believe, she happens upon the T. Matthew Fraggle Room, the cavern with the dozens of tunnels that lead to different places in "Outer Space." But when she accidentally spots a huge, blue dragon, it gets lost in Fraggle Rock. She tries to convince Gobo and Uncle Matt about the dragon, but they just think she's played make-believe too much, so it's up to Red to make things right.
Mokey wants to go all the way up to Wonder Mountain to see the Aurora Fragglialis, which only occurs once every 1000 days. But Red's worried about Mokey going alone, and even though she promised Mokey she trusted her enough to go by herself, Red decides to leave the duties of plant-sitting Lanford to Gobo, Boober and Wembley to watch over Mokey so nothing bad happens. The only problem is, Red falls victim to almost everything, while the dreamy Mokey just keeps going on. She gets torn up through some rough brush, falls off the Invisible Bridge, and almost gets enchanted by the Singing Cactus, when Mokey spots her and saves her. When asked why she decided to come along, Red says she wants to see the Aurora Fragglialis too. But later on, as they go past where the Avalanche Monster lives, he wakes up, and chases down the two girls. It's up to Mokey and Red to work together to get the Rock Monster off their tails in order to go and experience the Aurora Fragglialis before it's too late.
Gobo's getting ready to have a surprise party for himself, but when Uncle Matt shows up and says he can't come to the party, Gobo gets upset. Meanwhile, Matt takes Wembley aside and shows him the present he got for Gobo; a space frog. Matt then tells him that he wants Wembley to watch over it until he gets back from "Outer Space" so he can collect flies for the frog to eat. So it's up to Wembley to keep the space frog a secret until Matt gets back, but he has a hard time doing so. But is keeping the space frog in a jar, as a pet, for the rest of his life really the best thing for him? It's up to Wembley to decide what's best for the space frog, even if it means upsetting his buddy.