as a danger to the Earth. Much of the final season is thus concerned with PRAXIS' attempt to attack the pyramid, as well as with a "Red Virus" which is spreading in the oceans of Neri's home world, the Ocean Planet. Eventually, in the series finale, Jason, Brett, and Neri are able to repulse PRAXIS' efforts and the rebellion, and Earth is saved. Neri remains on Earth as the ambassador of the Ocean Planet, and she and Jason finally become a couple. The Bates family, Winston, Neri, Charlie, and the ORCA computer H.E.L.E.N. (Hydro Electronic Liaison ENtity) are the only constant characters for the show's entire run. However, the part of Dr. Bates is recast with Liz Burch after the second season and H.E.L.E.N. is "upgraded" in the fourth and final season. Cast Main cast Marzena Godecki as Neri (seasons 1–4) David Hoflin as Jason Bates (seasons 1–4) Jeffrey Walker as Brett Bates (seasons 1–4) Alex Pinder as Dr. Winston Seth (seasons 1–4) Kerry Armstrong as Dr Dianne Bates (seasons 1–2) Liz Burch as Dr. Dianne Bates (seasons 3–4) Nicholas Bell as Dr. Hellegren (seasons 1–3) Lauren Hewett as Mera (seasons 2–4) Jeremy Angerson as Kal (season 3) Brooke "Mikey" Anderson as Cassandra "Cass" Clayborn (season 3–4) Gregory Ross as Paul Bates (season 4) Tharini Mudaliar as Shersheba (season 4) Rhona Rees as Ilona (season 4) Terry Serio as Captain Phillips (season 2) While Ocean Girl featured the ensemble cast listed above, there were several characters who appeared for one season each, with four children appearing in two seasons each (three in Seasons 1 and 2, one in Seasons 3 and 4) as well as a few adults appearing in more than one season. Most of the cast changes were explained by their "friends" (or rather, their parents) having been transferred back to shore, with the exception of Season 4, where it was not noted at all. Other cast Pamela Rabe as Commander Byrne Joel De Carteret as Froggy Cassandra Magrath as Zoe Jacalyn Prince as Vanessa Joelene Crnogorac as Lena Hellegren William McInnes as Commander Lucas (season 1) Verity McIntyre as Morgan Clayborn Episodes Broadcast history The original Ocean Girl series ran on Australia's Network Ten between 1994 and 1997. Internationally, it was broadcast by The Disney Channel in the United States, Discovery Kids in the United Kingdom, YTV and Radio-Canada in Canada, TV Nova and Supermax in the