The Girls put on the annual Explorer's Day play about how HLC came to be and the Explorer's long-lost shipwreck, the Heart of the Sea, which newcomer and petulant egomaniac, CARTER GREENE, now wants.

Friends: Girls on a Mission

Explorer's Day

Heart Lake City has a blackout and the girls spring into action helping the town's people before ultimately discovering the bank has been robbed of one of HLC's oldest treasures.

Lights Out

Mia finds a treasure map she's sure was left by the Explorers and goes off by herself to find treasure, leaving the others to think she's missing.

Never Stop Exploring

When the Heartness Monster takes over HLC Lake, the Girls discover that it's a hoax and must get rid of it.

Heartness Monster

Everyone in town (including the girls) is excited to grow plants in Carter's newly donated community garden, only to discover that the water for the plants is coming from the soon-to-be drained Heart Lake!

Greene Gardens

When an Explorer's painting is stolen from the art museum, Emma must test her art skills by creating a decoy to save the matching painting -- which turns out to be hiding a valuable clue to finding the “Heart of the Sea” shipwreck.

Frame & Fortune

When Andrea's family heirloom goes missing, she realizes that it was actually stolen — and is a clue to the Heart of the Sea.

Locket & Key

The girls highlight their favorite parts of Heart Lake City to help promote Heart Lake City for a docuseries.

Real Friends

When City Hall gets shut down for renovations, the girls discover a secret, a side to Heartlake they never knew existed.

Tunnel of Shadows

When Stephanie's sister Roxy goes missing during her musical performance, the girls investigate her disappearance and find more than they expected under the theater.

Heartmore

The girls want to find the treasure before Carter does, so Andrea's dad gives them a scuba lesson.

Le Scuba

The girls piece together clues with a map of old town and find the map to the shipwreck of the Heart of the Sea and its treasure!

Map Quest

Determined to protect the Heart of the Sea and the history of HLC from Carter, the girls set off to find the treasure in a race to see who can get there first!

Heart of The Sea

Andrea's focus on winning the HLC talent show makes her lose focus on what's important and costs her.

Winner Sings All

When Liz reveals her new pet translation app, Mearrf, a day at the amusement pier proves to be more of a rollercoaster than the girls expected.

Mearrf

When the girls stay overnight in the lighthouse to take care of troubled animals at the Rescue, Emma wonders if the old lighthouse keeper's spooky journal is connected to the strange things that start happening.

Once Upon A Lighthouse

The girls use all of their talents to help save Barney from being forced out of the Police force and help Officer Laura keep her partner.

No Horsing Around

When the girls take over for Dean at the Cupcake Café, Zobo malfunctions and leaves destruction in his wake.

Zobo 2.0

The girls' attempts to return home after getting stuck out at sea lead to an important discovery.

Stranded

The girls learn that Carter is up to something underwater again – and this time it's dangerous.

Alvah's Flair

When Andrea loses her voice and has to rest it, the girls keep her busy until she can talk again.

Operation Keep Quiet

A stakeout to catch Carter leads to the girls making a new friend with ulterior motives.

Stakeout

The girls discover Carter's plans to build an underwater hotel and have to stop him.

The Real Deal

Andrea's performance at the clinic fundraiser saves the day and the boardwalk.

Walk This Way

Fed up with Carter destroying their town, the girls show him no one messes with Heart Lake City.

The Art of Being Carter Greene

The girls return the animals to the bay and have it declared a sanctuary to keep it safe.

Save the Bay

Pluto

Olivia trades places for a day with a famous actress who could be her double

Trading Places

When Andrea struggles to get used to her new house, a school dance reminds her change has upsides

House Party

A quest to relocate a cat family leads the girls to discover a new level of four-legged friendship

Four-legged Friends

The girls get snowed in and trapped in a shopping mall, and Emma is unable to go home to design her dress for an important job interview.

It's a Mall World

Mysterious characters in town lead the girls to discover a carnival and save a horse in distress

Fortunate Friends

The girls show the carnival members Heart Lake City and in return, and in return learn secrets of the fun fair.

Behind the Curtain

When the girls get stuck in the fun house, they have to come together to escape.

Funhouse Escape

The girls join in the carnival's farewell performance and Andrea gets some sisterly advice from Claire.

The Big Show

When 5 teenage BFFs set out to help their beloved hometown, they come to find out nothing is as it should be…

Trading Places

Full Episodes

Season 4, 8 episodes