Cleo is having her first spinnaker fitted. Spinnakers can be tricky, so Sydney and Zip will have to keep a close eye on Cleo as she learns the ropes. But Cleo is too excited to listen.

What's bumping the boats beneath the waves? It's Humpy the baby whale. When Humpy refuses to leave, can Muddles find the courage to guide Humpy out of the Harbour and reunite him with his mother?

Sydney and Zip are going to Dry Dock for their first check- up. But when Zip is too scared to go, her wobbly propeller sends her spinning out of control. Sydney will need to find where she's spun off.

Bryan crashes into the jetty and gets stuck. Everyone has a job to do to help except Sydney, who is too small. But when Bryan springs a leak, only Sydney, due to his size, can save the day.

The Bay hosts a Lantern Festival featuring a Dragon Boat race! Terry is keen to show the Bay at its best, but things unravel when Sydney, Zip and the Canoes decide to join in the race too!

It's a very foggy and everyone's been told to stay moored. But Zip and Sydney sneak out and mistake Muddles for the fearsome Bubble Bath Bay Monster! Zip will need to overcome fear to save her friend.

The Bay is throwing Rodney the sub a Welcome Home Party. But instead of decorating, Sydney dreams of traveling the Big Blue Sea. Zip and Stormy show him there's lots to explore right here at home.

When Stormy warns that there's a storm coming, Sydney and Zip laugh. But then a big storm hits, and Stormy is nowhere to be found the next morning. The hunt is on as Sydney and Zip fear the worst.

When Bonita's too impatient to fix her broken outrigger, Sydney helps with a temporary fix. But when her patched-up outrigger fails, Sydney and Zip must get her back on course before disaster strikes.

After losing a race to Jet, Sydney thinks his sails are holding him back. But when the boats are caught in a storm, Jet and Zip lose engine power. Sydney must use his sails to get them home!

When Zip takes her Harbour Navigation Test, Sydney gets in the way as he tries to support his friend. With the cheeky Canoes to look after too, Zip must keep it together to pass her test.

Lulu narrowly avoids an accident when Slick kicks a football into her path as she lands. Sydney will have to mark out a new landing strip for her, before Slick's playfulness lead to more problems.

A missing shipping container is found in the Harbour so Muddles is sent to salvage it. But after Sydney hurts Zip's feelings, they'll need to make up in time before Muddles barges through.

Slick is getting in the way of a garbage clean up. Sydney can keep Slick occupied - he's going to teach him tricks. But can Slick do one particular trick to save the Bay from being polluted?

Sydney is so busy practising for the Time Trials that he doesn't get enough sleep. The next day he can't help but drift off to sleep, and into danger! But Zip won't let him miss the Time Trials!

There's a Grand Parade planned for Queen Josephine's return visit. Sydney is determined to work the hardest and look his best to earn the honour of being flag bearer and leading the parade.

When Rodney's nephew Hilton visits, Sydney is dazzled by tales of submarine school. But a dare gets Sydney stranded outside The Heads. Hilton will need to put his boasts into action to save Sydney.

When a lost duckling turns up in the Bay, Stormy volunteers to care for him. But when Muddles drops a crate of rubber ducks, the duckling gets lost! Can the fleet find the real duckling in the crowd?

When Sydney's toolbox gets too full, Terry makes him clean it out. But getting rid of his favourite things isn't easy. Especially when you accidentally give away Aurora's spare light bulb.

Muddles is grumpy so Sydney and Zip try to cheer him up. No matter what they try, nothing lifts his spirits. But when they discover what's really making Muddles grumpy, it's an easy fix.

The fleet don't know that Terry has lost his memory after a bump on the funnel so cheeky Jet convinces Terry they're best friends. Sydney and Zip are left to run the Harbour - where has Terry got to?

It's carnival day and everyone is enjoying the games - except for Jet who wants to win everything. When Jet is teamed with Cleo for the scavenger hunt, he must decide between winning or helping.

Stormy is hurt while preparing for the Regatta, and takes advantage of Sydney's kindness. Muddles soon does the same, leaving Zip run off her rudder. But pretending to be sick isn't a smart idea.

Rodney has a serious case of the hiccups and it's driving the whole bay crazy. Armed with everybody's peculiar remedies, Sydney and Zip set out to cure their old friend.