Neri and Mera make the difficult decision to return to the Planet of the Oceans and convince Dianne that she must continue her research. Froggy fixes H.E.L.E.N. with a little help from Damien. Neri and Mera are spirited back to the island - with Winston, Mick, and Zoe acting as decoys to lure away Dr. Hellegren. The ruse is uncovered by Forsyth but he cannot warn Dr Hellegren as Commander Byrne has him arrested after H.E.L.E.N. identifies him as her sabateur. Meanwhile, Kimberly, Vanessa, and Joanne keep Liselle from contacting UBRI, securing a safe arrival on the island for Neri and Mera. On the island, final goodbyes are said as the girls board the spacecraft for home. However, after the ship departs, one person has stayed behind - Neri, who explains that while Mera has returned home to bring hope to their people, she belongs on the island and has stayed to "finish father's work."