E1 - The Seventh Cycle

Aired: February 15, 2015

When the pod decides Zac is a threat and must give up his merman powers, two new mermaids, Mimmi and Ondina, are sent to make sure he obeys.

E2 - Sticky Situation

Aired: February 22, 2015

With Evie now a mermaid, Mimmi and Ondina try a dangerous spell to change her back to a human form, but the results are less than ideal.

E3 - Discovery

Aired: March 01, 2015

When Zac has a powerful vision about his connection to Mako Island, he and the mermaids visit the island to investigate.

E4 - A New Tail

Aired: March 08, 2015

Erik's curiosity about the girls and Mako Island becomes a problem when he decides to investigate further.

E5 - Bad For Business

Aired: March 15, 2015

When Evie's dad decides to take tourists on dive charters to Mako Island, the gang must find a way to change his mind.

E6 - Stormy Seas

Aired: March 22, 2015

Sirena gives Evie mermaid lessons, which rubs Ondina the wrong way, while Erik tries to get to the bottom of Zac and Cam's falling out.

E7 - Awakening

Aired: March 29, 2015

With the full moon approaching, Zac's plan to avoid Mako Island is dealt a blow when his father insists they go on their annual camping trip.

E8 - Land School

Aired: April 05, 2015

When Mimmi goes to the first day of the new school year, things get out of hand fast when she runs afoul of the science teacher.

E9 - Stowaway

Aired: April 12, 2015

When a young mermaid follows Ondina back to Mako Island after a mermaid council meeting, it could spell trouble with the pod.

E10 - Keeping The Secret

Aired: April 19, 2015

When David sees Evie in the water as a mermaid, it puts Zac and the girls' secret at risk unless they can convince David he's wrong.

E11 - Only As Young As You Feel

Aired: April 26, 2015

Ondina adds too much jellyfish extract to Mimmi's body lotion, and the results put Principal Santos in dangerous waters at the marine park.

E12 - Supersized

Aired: May 03, 2015

When Mimmi loses her moon ring in the Ocean Café's cooler room, it creates havoc for David and his brother's business.

E13 - Reunion

Aired: May 10, 2015

On the night of the full moon, Zac and Erik swim to Mako Island and unlock the merman chamber, revealing a startling secret.

E14 - A New Man

Aired: May 17, 2015

Zac struggles to come to terms with the news that he's a real merman, he's adopted and Mimmi is his sister.

E15 - Careful What You Wish For

Aired: May 24, 2015

After Cam absorbs moon pool water, he discovers he has power over water, which gets him a place in the trials for the school swim team.

E16 - First Date

Aired: May 31, 2015

Ondina sneaks Erik into the grotto to duplicate a pearl he gave her, but she accidentally turns him into a copy of Poseidon.

E17 - The Merman Code

Aired: June 07, 2015

When Erik dives down and touches one of the rock outcrops on Mako reef, he's transported into a sphere of endless water with no way out.

E18 - The Siren

Aired: June 14, 2015

When Sirena sees a video that shows a kayaker being lured by a mermaid's song, she starts to follow David obsessively, and he falls under her spell.

E19 - Surprise!

Aired: June 21, 2015

A surprise birthday party is in the works for Evie, who accidentally shrinks herself and falls into an aquarium after trying on Mimmi's mood ring.

E20 - The Job

Aired: June 28, 2015

Mimmi takes a job at the marine park, where she meets Chris, a young man who is desperate to get into a dolphin training program.

E21 - New Orders

Aired: July 05, 2015

On the night of the full moon, Zac and Ondina sneak away to Mako, and Ondina reveals her plan to destroy the chamber.

E22 - The Last Dance

Aired: July 12, 2015

Ondina doesn't want to choose between Erik and the pod when the pod returns. To cheer her up, Erik decides to throw a party in the café.

E23 - Stay or Go

Aired: July 19, 2015

At the marine park, Ondina and Mimmi get into trouble when a dolphin splashes them and a little girl sees them transform into mermaids.

E24 - The Truth About Evie

Aired: July 26, 2015

When Evie comes down with a fever that causes the temperature in the room to soar, Carly suspects that her friend is keeping a secret from her.

E25 - The Trident Stone

Aired: August 02, 2015

When Erik learns that the trident stone is the missing element needed to activate the merman chamber, Zac gives it to the mermaids for safekeeping.

E26 - The Chosen One

Aired: August 09, 2015

The chamber's true purpose is revealed: to drain the magic from all mermaids. Zac risks his life to shut it down and restore the mermaids' magic.