Seven colour gems fell from the Great Rainbow. Zuzu, Bibi and Rusty find one gem every week and rebuild the Rainbow Bridge in time for Rainbow Night on New Year's Eve.
Twinkle the smiling star welcomes viewers to ZuzuLand, where colours come from friendship. Zuzu wakes up with a big idea: give everyone in the village a hello-hug before lunch!
Bibi is counting carrots for the Meadow Picnic, but playful pony twins Dot and Dash keep hopping through her rows. Her careful plan needs a new twist!
Rusty builds a whirring Riddle Machine for the treehouse, but it gets stuck asking the same tricky riddle over and over. Only a friend who listens can help.
Zuzu takes his first ride in a hot-air balloon and drifts up to the Cloud Stables, where gentle Nimbus the cloud horse has lost her rainbow ribbon.
Bibi's kitten Mimi loses her little silver bell, and the friends follow jingly sounds all around Zuzu Village to find it.
The friends visit Giggle Harbour, where Captain Barnacle needs help raising the Giggle Wave's purple-and-white striped sails.
During a visit to Queen Lumina, a gentle swirl of sparkly magic wind tickles the Great Rainbow, and its seven colour gems pop out and drift away across ZuzuLand.
Bibi draws a map of ZuzuLand to plan the Rainbow Quest, and wise Grandpa Oak shares a riddle-clue about where the red gem might be.
Searching for red clues, the friends find a pumpkin patch where every pumpkin has a riddle painted on it. Grumble the troll grumbles that nobody ever solves them.
It's the cosy Pumpkin Glow costume party! Zuzu can't pick a costume, so his friends help him find one that's just right.
A line of tiny red ladybugs marches across Rainbow Meadow, and Bibi thinks they might lead to the red gem, if only she can count their spots correctly.
The old bridge to the far meadow has a wobbly red plank, and Grumble is too embarrassed to ask for help fixing it. Rusty has a fox-tastic gadget idea.
Skye sees a red glimmer in the evening sky, so Zuzu and his friends ride Nimbus at sunset to investigate, but is it the gem or just the sunset?
In a field of thousands of red poppies, the friends must find one glowing red gem. Bibi's plan and Professor Hoot's science help them search square by square.
Captain Barnacle's old telescope has gone foggy, and Rusty helps clean and improve it so they can look for the orange gem out at sea.
The friends set sail on the Giggle Wave, but Zuzu rushes aboard and forgets the snacks, the map and Pepper! He learns that checking makes a voyage happier.
Bibi wants to help on the ship by tying the sailor knots, but her paws keep making tangles. Skye teaches her a knot song that makes it fun.
On the harbour beach, Rusty discovers that seashells make different sounds, and with Dot and Dash he builds a seashell band to call the friendly dolphins who might know about the gem.
A soft, tickly fog rolls over the harbour while the Giggle Wave sails toward the lighthouse. The friends can't see far, so they use listening and singing to find their way.
A little island near the lighthouse can only be reached when the tide goes out. Bibi works out when to go, and the friends find a beach full of orange starfish.
The friends climb the old lighthouse, where the orange gem is glowing inside the lamp. Rusty needs a clever way to reach it without breaking anything.
Twinkle says the yellow gem is somewhere in the sky. Zuzu and the pony twins Dot and Dash have a friendly hot-air balloon race to the floating islands.
At the Cloud Stables, Nimbus teaches Bibi how to see shapes in the clouds. One cloud shape looks like a clue to the yellow gem.
The friends land on a floating island that bounces like a trampoline! Professor Hoot and Rusty work out how to bounce in the right direction.
Twinkle the star feels tired and her shine is low, because the missing gems make the sky less cheerful. Zuzu and his friends think of ways to cheer her up.
Skye needs to sing a special high note to wake the sleepy sky islands, but she's nervous. Shy Bibi understands and helps her friend feel brave.
Bibi's kitten Mimi grabs a bunch of yellow balloons and floats gently to a nearby sky island. Rusty invents a soft way to bring her back.
Following Mimi's golden feather, the friends ride Nimbus to the highest floating island, where a sunflower holds the yellow gem in its petals.
Grandpa Oak tells the friends that the green gem is deep in the Whispering Woods, where the trees talk in whispers. Bibi learns to listen to quiet voices.
In a clearing of the Whispering Woods, every word echoes back, and the echoes answer with riddles! Rusty and his friends must solve them to find the path.
Zuzu runs ahead into a maze of tall green hedges and gets turned around. Grumble, who knows the woods well, helps the friends find each other.
Bibi finds an old map made of moss on a big rock. Dot and Dash are visiting the woods, and together they work out what its shapes mean.
The Lantern River Festival is tomorrow! Rusty sets up a lantern workshop at the treehouse, but his lantern-making machine makes very wonky lanterns.
On a magical festival night, everyone floats their lanterns down the river in the Whispering Woods. Zuzu's lantern drifts off on its own, and following it leads to a surprise.
The green gem is sleeping inside a seed at the roots of the Heart Tree. Bibi's patience and caring help it grow and sparkle back to life.
The friends visit sparkling Starfall Falls, where the water twinkles like stars. Rusty's splash-proof suit has a few leaks!
Captain Barnacle visits Starfall Falls to help the friends build a raft. Zuzu wants to launch it right away, but it needs to float first!
Rain falls on Zuzu Village, and the friends think it's a day off from questing. But Bibi turns puddle jumping with Dot and Dash into a counting game that reveals a blue clue.
Rusty and Professor Hoot build a bubble machine to look inside the deep pool at Starfall Falls. The bubbles get bigger and bigger!
Mimi the kitten doesn't like water, but the friends find a pond near the falls where water drops make music. Zuzu helps Mimi feel safe and curious.
Nimbus the cloud horse flies the friends behind the curtain of Starfall Falls, where a sparkling cave hides a blue puzzle.
The blue gem rests at the bottom of a clear pool behind the waterfall. Grumble, a great swimmer, and Rusty's gadget help bring it up.
The indigo gem only shows itself at night, so the friends have an evening picnic on Moonlit Hill. Zuzu struggles to stay calm and quiet.
Professor Hoot brings his star chart to Moonlit Hill, and Bibi counts the stars with Twinkle to find a special star picture that points to the indigo gem.
Inside the Crystal Caves, friendly glow-worms light the way, but they're too shy to shine. Rusty tells jokes to make them glow.
Deeper in the Crystal Caves, every sound bounces back, and the friends meet Grumble, who loves singing in the echo chamber. Together they make an echo song.
Back at the treehouse, Mimi naps in a moonbeam and twitches as she dreams. When she wakes, she leads Bibi to a moonlit clue.
The crystal door in the caves needs light shone through the indigo key. Rusty builds a night-light gadget, and Nimbus flies in moonlight to power it.
Behind the crystal door is a room full of twinkling crystals, and the indigo gem is hiding among them. Zuzu must slow down to find the real one.
Skye delivers a royal letter: Queen Lumina invites the friends to Rainbow Castle to search for the violet gem. Shy Bibi is asked to give a thank-you speech.
Rainbow Castle has three puzzle doors leading to the violet tower, and each one asks a riddle. Rusty loves riddles but learns his friends have good answers too.
The Queen hosts a royal tea party in the castle garden. Zuzu is so excited that he gobbles the cakes too fast, and Dot and Dash show him how to slow down and share.
The teapot clue leads to the castle's lavender garden, where Mimi chases butterflies through purple flowers. Bibi spots a pattern in the flower beds.
The tallest tower has a hundred steps, and Rusty wants to invent an elevator. Instead, the friends climb together, counting and cheering.
At the top of the tower, the Portrait Hall shows paintings of past kings and queens with their friends. Zuzu must find the one picture that's different.
In the secret tower room, the violet gem rests in a music box that only opens with a friendship song. Bibi leads everyone to sing together.
With all seven gems safe in the treehouse, the first snowflake of winter falls on ZuzuLand. Rusty invents a snowflake catcher to study it.
Snow covers the Snowy Peaks, and the friends go sledding with Dot and Dash. Zuzu wants to go first every time but learns to share the sled.
Bibi plans to build a snow friend, and Grumble, who loves snow, joins in. They decide to build a whole snow friend family so nobody feels lonely.
It's time to plan the new Rainbow Bridge for the seven gems. Rusty and Professor Hoot draw a blueprint, but Rusty adds too many silly gadgets.
Nimbus pulls a cloud sleigh to collect special starlight snow from Snowy Peaks to decorate the bridge. Zuzu learns to steer carefully.
Snow has made the village cold, so Bibi and Captain Barnacle make warm cocoa for everyone. Bibi counts cups so nobody is left out.
The friends practise putting the seven gems in rainbow order on a model bridge. One gem keeps wobbling, and Grandpa Oak hints that it needs something special.
Twinkle leads the friends to a sleepy tree on Moonlit Hill that only lights up when friends decorate it with kindness. Its light will make the gems stay in place.
On gift day, Bibi worries she has nothing to give her friends. Mimi helps her discover that the best gifts come from the heart.
The Rainbow Night festival needs a stage, and Rusty, Captain Barnacle and Dot and Dash have a fix-it day, building the stage from old ship planks.
Zuzu wants to plan the festival map himself, but Nimbus and Professor Hoot help him see the meadow from the sky to plan it fairly for everyone.
Bibi helps Queen Lumina decorate Rainbow Castle with rainbow banners for the festival, but Mimi keeps playing with the ribbons!
Grumble has a secret: he's been making something special for the festival. Rusty and Grandpa Oak help him finish it without spoiling the surprise.
The friends rehearse every part of Rainbow Night with Queen Lumina and Captain Barnacle. When the rehearsal goes wonky, Bibi reminds everyone that it doesn't have to be perfect.
On New Year's Eve, all of ZuzuLand gathers at Rainbow Castle. The friends place the seven gems on the Rainbow Bridge, and the Great Rainbow returns with fireworks at midnight!