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Where to watch "H2o I Havfruenes Verden"
13. Trapped
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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.
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12. Imminent Danger
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Having played one too many practical jokes, Teddy can't get anyone to believe his warning that an underwater volcano is about to erupt.
11. Underwater Takeover
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The mermaids turn to a cranky giant octopus for help when the Vandals invade the bay with a horde of stinging jellyfish.
10. The Creature from the Bay
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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.
9. Robot Duel
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Lewis is thrilled when the university hosts an underwater robot competition, but the girls fret over the safety of their marine friends.
8. Three Days Underwater
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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.
7. The Return of the White Mermaid
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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.
6. Handle with Care
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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.
5. A Strange Phenomenon
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When her father goes to sea on a mission, Cleo's worries begin to affect her dreams. But could her nightmares be trying to tell her something?
4. Kidnapped!
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The girls and Bobby the dolphin untangle a mystery when Bobby's twin, Robby, is captured by someone in a mysterious speedboat.
3. Valentine's Day
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When Lewis promises to tell his Valentine's Day sweetheart, Abby, a big secret, jealous Cleo fears he will give away the girls' mermaid identities.
2. Memory Lapse
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When the stone circle causes Cleo to forget that she can turn into a mermaid, Emma and Rikki scramble to keep her from transforming in public.
1. Reported Missing
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Clownfish are disappearing from the bay, so the girls spring into action to find out why. Could a mysterious diver be the culprit?
