Air Date:
6 October 2006
Directed by:
Jeffrey Walker
Written by:
Chris Anastassiades
Preceded By:
Followed By:

Surprise! is the 14th episode in Season 1 of H2O: Just Add Water.


Cleo's dad plans an embarrassing surprise party for her 16th birthday so she escapes to Mako Island. Zane and Lewis almost spot her there on their expedition to catch the sea monster.


Believing there is some kind of mysterious creature living under the sea, Zane mounts an expedition to catch the “monster” - and he wants Lewis to help. At first, Lewis declines until the girls convince him to work with Zane – and run interference. Meanwhile, it’s Cleo’s 16th birthday and her dad has planned an embarrassingly childish surprise party, which you would expect a young girl turning 6 to have, not 16. She decides to escape to Mako Island where she is almost spotted as a mermaid by Zane. When she finally returns she finds Lewis has organized the best present of all – a more mature surprise party at the juice bar.


  • First time Zane works with Lewis.
  • Second birthday in the series, the fourth party in the series, and the second event at the JuiceNet.
  • Cleo hates her birthdays due to her father's childish party planning.
  • Emma knew Cleo since she was 6 years old.
  • Cleo celebrates her 16th birthday in this episode.
  • Emma has been to only one of Cleo's birthday parties.
  • Rikki's first time to Cleo's birthday party. Since she moved to town at the beginning of the show.



  • International Airdates:
    • Denmark: March 8, 2008 on Jetix
    • Poland: September 23, 2007 on Jetix
  • This episode aired in the United States on May 25, 2008 on Nickelodeon.
  • Jeffrey Walker, who directs the rest of this season, appeared in the series Ocean Girl (also made by Jonathan M. Shiff) as Brett Bates.


Rikki: Well this is a valuable lesson. Next time Zane's drowning, don't help.

Emma: Oh no, my tail!
Lewis: See, that's why I'm hanging around with you guys. Cause all the other girls at school are like, oh no my make-up.

Rikki (Talking about Cleo's party): Do I look like the sort of girl to be caught dead on a pony?
Mr. Setori: Not really.
Rikki: Figure it out.

Lewis: Who's the geek here?
Zane: You are.
Lewis: You bet I am!

Emma: Keep your friends close and keep your enemies out in the middle of the ocean.

Lewis: Zane, I tend to see the glass as half full, while you see it as something to hit people with!

Zane: Lewis, buddy, just the guy I was looking for, you see I have a problem.
Lewis: Let me guess you're vain, self-centered, you're disgustingly rich.....did you just call me 'buddy'?

Don: One last time.
Cleo: Race you.




H2O - just add water S1 E14 - Surprise! (full episode)

H2O - just add water S1 E14 - Surprise! (full episode)