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.
Is this the best episode?
The peak run. Top 40% of seasons by average rating — consecutive, with an average of 6.88.
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Phoebe Tonkin
Cleo Sertori
Cariba Heine
Rikki Chadwick
Indiana Evans
Isabel "Bella" Hartley
Luke Mitchell
Will Benjamin
Burgess Abernethy
Zane Bennett
All 78 episodes plotted by IMDb rating
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26 episodes • 2006Avg: 6.6
| # | Episode | Air Date | Rating |
|---|---|---|---|
| 1 | Metamorphosis | Jul 7, 2006 | 6.9 |
| 2 | Pool Party | Jul 14, 2006 | 6.0 |
| 3 | Catch of the Day | Jul 21, 2006 | 6.2 |
| 4 | Party Girls | Jul 28, 2006 | 5.8 |
| 5 | Something Fishy | Aug 4, 2006 | 6.0 |
| 6 | Young Love | Aug 11, 2006 | 5.8 |
| 7 | Moon Spell | Aug 18, 2006 | 5.8 |
| 8 | The Denman Affair | Aug 25, 2006 | 5.8 |
| 9 | Dangerous Waters | Sep 1, 2006 | 5.4 |
| 10 | The Camera Never Lies | Sep 8, 2006 | 6.0 |
| 11 | Sink or Swim | Sep 15, 2006 | 5.8 |
| 12 | The Siren Effect | Sep 22, 2006 | 6.0 |
| 13 | Shipwrecked | Sep 29, 2006 | 6.4 |
| 14 | Surprise! | Oct 6, 2006 | 5.7 |
| 15 | The Big Chill | Oct 13, 2006 | 7.7 |
| 16 | Lovesick | Oct 20, 2006 | 7.7 |
| 17 | Under the Weather | Oct 27, 2006 | 7.7 |
| 18 | Bad Moon Rising | Nov 3, 2006 | 7.7 |
| 19 | Hurricane Angela | Nov 10, 2006 | 4.7 |
| 20 | Hook, Line and Sinker | Nov 17, 2006 | 6.5 |
| 21 | Red Herring | Nov 24, 2006 | 7.7 |
| 22 | Fish Out Of Water | Dec 1, 2006 | 6.5 |
| 23 | In Too Deep | Dec 8, 2006 | 7.7 |
| 24 | Love Potion #9 | Dec 15, 2006 | 7.7 |
| 25 | Dr. Danger | Dec 22, 2006 | 8.0 |
| 26 | A Twist in the Tail | Dec 29, 2006 | 7.7 |
26 episodes • 2007Avg: 6.9Golden Era
| # | Episode | Air Date | Rating |
|---|---|---|---|
| 1 | Stormy Weather | Sep 28, 2007 | 7.0 |
| 2 | Control | Oct 5, 2007 | 7.0 |
| 3 | The One That Got Away | Oct 12, 2007 | 7.0 |
| 4 | Fire and Ice | Oct 19, 2007 | 7.0 |
| 5 | Hocus Pocus | Oct 26, 2007 | 7.0 |
| 6 | Pressure Cooker | Nov 2, 2007 | 7.0 |
| 7 | In Hot Water | Nov 9, 2007 | 7.0 |
| 8 | Wrong Side of the Tracks | Nov 16, 2007 | 7.0 |
| 9 | Riding for a Fall | Nov 23, 2007 | 7.0 |
| 10 | Missed the Boat | Nov 30, 2007 | 7.0 |
| 11 | In Over Our Heads | Dec 7, 2007 | 7.0 |
| 12 | Fish Fever | Dec 14, 2007 | 7.0 |
| 13 | Moonwalker | Dec 21, 2007 | 4.0 |
| 14 | Get Off My Tail | Dec 28, 2007 | 7.0 |
| 15 | Irresistable | Jan 4, 2008 | 7.0 |
| 16 | Double Trouble | Jan 11, 2008 | 7.0 |
| 17 | Moonstruck | Jan 18, 2008 | 7.0 |
| 18 | The Heat Is On | Jan 25, 2008 | 7.0 |
| 19 | The Gracie Code (1) | Feb 1, 2008 | 7.0 |
| 20 | The Gracie Code (2) | Feb 8, 2008 | 7.0 |
| 21 | And Then There Were Four | Feb 15, 2008 | 7.0 |
| 22 | Bubble Bubble, Toil and Trouble | Feb 22, 2008 | 7.0 |
| 23 | Reckless | Feb 29, 2008 | 7.0 |
| 24 | Three's Company | Mar 7, 2008 | 7.0 |
| 25 | Sea Change | Mar 14, 2008 | 7.0 |
| 26 | Unfathomable | Mar 21, 2008 | 7.0 |
26 episodes • 2009Avg: 6.0Valley of Despair
| # | Episode | Air Date | Rating |
|---|---|---|---|
| 1 | The Awakening | Oct 26, 2009 | 5.7 |
| 2 | Jungle Hunt | Oct 27, 2009 | 6.0 |
| 3 | Keep Your Enemies Close | Oct 28, 2009 | 6.0 |
| 4 | Valentines Day | Oct 29, 2009 | 6.0 |
| 5 | Big Ideas | Oct 30, 2009 | 6.0 |
| 6 | Secrets & Lies | Nov 2, 2009 | 6.0 |
| 7 | Happy Families | Nov 3, 2009 | 6.0 |
| 8 | Kidnapped | Nov 4, 2009 | 6.0 |
| 9 | The Sorcerer's Apprentice | Nov 5, 2009 | 7.0 |
| 10 | Revealed | Nov 6, 2009 | 6.0 |
| 11 | Just A Girl At Heart | Jan 18, 2010 | 6.0 |
| 12 | Crime & Punishment | Jan 19, 2010 | 6.0 |
| 13 | To Have & To Hold Back | Jan 21, 2010 | 6.0 |
| 14 | Mermaid Magic | Feb 22, 2010 | 6.0 |
| 15 | Power Play | Feb 23, 2010 | 6.0 |
| 16 | The Dark Side | Feb 24, 2010 | 6.0 |
| 17 | A Magnetic Attraction | Feb 25, 2010 | 6.0 |
| 18 | Into The Light | Apr 12, 2010 | 6.0 |
| 19 | Breakaway | Apr 13, 2010 | 6.0 |
| 20 | Queen For A Day | Apr 13, 2010 | 6.0 |
| 21 | The Jewel Thief | Apr 14, 2010 | 6.0 |
| 22 | Mako Masters | Apr 14, 2010 | 6.0 |
| 23 | Beach Party | Apr 15, 2010 | 6.0 |
| 24 | Too Close For Comfort | Apr 15, 2010 | 6.0 |
| 25 | A Date With Destiny | Apr 16, 2010 | 6.0 |
| 26 | Graduation | Apr 16, 2010 | 6.0 |
