H2O: Mermaid Adventures: Episode List

Season 1 episode 1 (147)- "The Secret of Mako Island"
Airdate: May 22, 2015

Cleo, Emma and Rikki get stranded on Mako Island and fall into a magic pool where their lives change forever.

Season 1 episode 2 (148)- "Caught in the Net"
Airdate: May 22, 2015

Emma competes in a contest, Cleo is stuck babysitting an intern and save an injured sea turtle.

Season 1 episode 3 (149)- "The White Mermaid"
Airdate: May 22, 2015

The girls discover of an ancient mermaid statue and return it but treasure hunters have another idea.

Season 1 episode 4 (150)- "A Stormy Party"
Airdate: May 22, 2015

A storm threatens to wash out a birthday party.

Season 1 episode 5 (151)- "Mako Island Hotel"
Airdate: May 22, 2015

Zane's father plans a luxury resort on Mako Island.

Season 1 episode 6 (152)- "The Mysterious Seaweed"
Airdate: May 22, 2015

Aggressive blue Sea Anemone attacks Emma.

Season 1 episode 7 (153)- "It's in the Bag!"
Airdate: May 22, 2015

Discarded plastic bags pose a threat to Teddy and his friends.

Season 1 episode 8 (154)- "Dolphin City Triangle"
Airdate: May 22, 2015

Atmospheric disturbances result in disastrous consequences.

Season 1 episode 9 (155)- "Poseidon's Daughter"
Airdate: May 22, 2015

Dolphin City is the location for a new movie.

Season 1 episode 10 (156)- "Dolphin City Mascot"
Airdate: May 22, 2015

Danny gets captured by the Oceanic Center for observation.

Season 1 episode 11 (157)- "Bad Waves"
Airdate: May 22, 2015

Lewis and the girls must find what's behind mysterious sound waves that are creating havoc.

Season 1 episode 12 (158)- "Jaws-ache!"
Airdate: May 22, 2015

Berk breaks a tooth and wanders near the beach in pain, causing a panic.

Season 1 episode 13 (159)- "The Lost Ring"
Airdate: May 22, 2015

Rikki takes matters into her own hands by spying on her dad and his new girlfriend.

season 2 episode 1 (160)- "Reported Missing"
Airdate: July 15, 2015

Clown fish begin to vanish, so the girls investigate why this is happening.

season 2 episode 1 (161)- "Memory Lapse"
Airdate: July 15, 2015

Cleo forgets about her ability to change into a mermaid, so Emma and Rikki must make sure she doesn't transform in public.

season 2 episode 3 (162)- "Valentine's Day"
Airdate: July 15, 2015

Lewis wants to share a big secret with Abby on Valentine's Day, and Cleo worries that he will tell her about the girls' mermaid identities.

season 2 episode 4 (163)- "Kidnapped!"
Airdate: July 15, 2015

Bobby's twin brother gets abducted by someone in a curious speedboat.

season 2 episode 5 (164)- "A Strange Phenomenon"
Airdate: July 15, 2015

Cleo has some powerful nightmares after her father goes to sea on a mission.

season 2 episode 6 (165)- "Handle with Care"
Airdate: July 15, 2015

Tired of the racket Miriam and Zane are making at their beach party, Bernie leaves his cave -- giving the Vandals a chance to move right in.

Season 2 episode 7 (166)- "The Return of the White Mermaid"
Airdate: July 15, 2015

To protect the White Mermaid, the girls guide explorer Stanley Finch to the underwater stone circle, whose magic makes Stanley think he's a pirate.

Season 2 episode 8(167)- "Three Days Underwater"
Airdate: July 15, 2015

When a spell forces Rikki to remain a mermaid until the next full moon, she has to find a way to lay low -- and underwater -- for three full days.

Season 2 episode 9 (168)- "Robot Duel"
Airdate: July 15, 2015

Lewis is thrilled when the university hosts an underwater robot competition, but the girls fret over the safety of their marine friends.

Season 2 episode 10 (169)- "The Creature from the Bay"
Airdate: July 15, 2015

Emma's younger brother catches a glimpse of her mermaid tail and thinks he's seen a sea monster -- soon the whole town is in an uproar.

Season 2 episode 11 (170)- "Underwater Takeover"
Airdate: July 15, 2015

The mermaids turn to a cranky giant octopus for help when the Vandals invade the bay with a horde of stinging jellyfish.

Season 2 episode 12(171)- "Imminent Danger"
Airdate: July 15, 2015

Having played one too many practical jokes, Teddy can't get anyone to believe his warning that an underwater volcano is about to erupt.

Season 2 episode 13 (172)- "Trapped"
Airdate: July 15, 2015

Lewis joins a famous explorer in a high-tech submarine to hunt for a sunken treasure ship, but a mishap strands them at the bottom of the sea.