Season
- Season 3 2009-10-26
- Season 2 2007-09-28
- Season 1 2006-07-07
Episode
- Episode 1: Metamorphosis
- Episode 2: Pool Party
- Episode 3: Catch of the Day
- Episode 4: Party Girls
- Episode 5: Something Fishy
- Episode 6: Young Love
- Episode 7: Moon Spell
- Episode 8: The Denman Affair
- Episode 9: Dangerous Waters
- Episode 10: The Camera Never Lies
- Episode 11: Sink or Swim
- Episode 12: The Siren Effect
- Episode 13: Shipwrecked
- Episode 14: Surprise!
- Episode 15: The Big Chill
- Episode 16: Lovesick
- Episode 17: Under the Weather
- Episode 18: Bad Moon Rising
- Episode 19: Hurricane Angela
- Episode 20: Hook, Line and Sinker
- Episode 21: Red Herring
- Episode 22: Fish Out Of Water
- Episode 23: In Too Deep
- Episode 24: Love Potion #9
- Episode 25: Dr. Danger
- Episode 26: A Twist in the Tail
H2O: Just Add Water Season 1 A Twist in the Tail
H2O: Just Add Water revolves around three teenage girls facing everyday teen problems with an added twist: they cope with the burden of growing a giant fin and transforming into mermaids whenever they come in contact with water.
