. . . "Unfathomable is the 26th and final episode of Season 2 of H2O: Just Add Water. It was originally meant to be the series finale."@en . . "Unfathomable is the 26th and final episode of Season 2 of H2O: Just Add Water. It was originally meant to be the series finale."@en . . . . . "Season 2: Episode 26: Unfathomable"@en . .