H2O: Just Add Water premiered 20 years ago today, introducing audiences to the story of three teenage girls whose lives changed forever after they mysteriously transformed into mermaids. The Australian series first aired on 7 July 2006 and ran for three seasons until 2010, becoming a global hit and earning a devoted fanbase thanks to its blend of friendship, adventure and supernatural drama. Even two decades later, the show remains a nostalgic favorite, with new generations continuing to discover it through streaming and social media. #h2o #tv #australia #mermaids #viral