Season 2

Ep 26. Unfathomable

TV-PG
March 21, 2008
24 min
8.5 (44)

A unusual and rare planetary alingment is set to cause the full moon to remove a mermaids powers if they enter the moon pool! Charlotte shows immunity and tries to reveal the girls' secret before Lewis takes her to Mako Island. The girls follow and a battle erupts. But who will win?

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Watch H2O: Just Add Water - Unfathomable (s2 e26) Online - Watch online anytime: Stream, Download, Buy, Rent

H2O: Just Add Water, Season 2 Episode 26, is available to watch free on Pluto TV and stream on Network Ten. You can also stream, download, buy, rent H2O: Just Add Water on demand at Prime Video, Netflix, Amazon, Apple TV Store online.