Ocean Girl - Season 3 - Eps 22: The Safe Deposit Key
The cadets' exam results are in and after looking at her's, Sallyanne tells Jason he would be better off with another partner. Mera reveals to Neri and her friends that Charlie's song is the trigger that activates the Synchronium. Kal overhears this and quickly goes to tell Dr. Hellegren. Hellegren meanwhile has to contend with his financiers who are anxious for results. Mera is taken to ORCA and introduced to Benny, Cass and Lena. Neri and Mera talk Lena into stealing the key her father wears around his neck—it is the only way to gain access to the Synchronium that UBRI has. Outside the Hellegren home, Kal makes a surprise appearance wanting to help. After Lena gets them into the house and Neri is about to get the key, Kal intentionally knocks over a vase waking Hellegren. They are all able to escape but do not get the key. Disappointed about her scholastic performance so far, Sallyanne wants to quit but decides against it after saving Jason when a bulkhead is breached.
About Ocean Girl

Title: Ocean Girl
First Air Date: 1994-08-29
Last Air Date: 1997-12-22
Status: Ended
Rating: 7/10 (from 11 votes)
Language: EN
Seasons: 4
Total Episodes: 78
Network: Network Ten
Genres: Drama, Action & Adventure, Sci-Fi & Fantasy
Production Companies: Unknown
Synopsis
Ocean Girl is an Australian science fiction TV series aimed for family audiences and starring Marzena Godecki as the lead character. The show is set in the near future, and focuses on an unusual girl named Neri who lives alone on an island, and the friendships she develops with the inhabitants of an underwater research facility called ORCA. The show is an example of deep ecology science fiction.
Cast

Marzena Godecki
Neri

David Hoflin
Jason Bates

Jeffrey Walker
Brett Bates

Lauren Hewett

Kerry Armstrong

Liz Burch

Anthony Hayes

William McInnes

Christopher Kirby

Kristy Barnes Cullen