4x26 - Ocean Girl

Asleep on her island late at night, Neri has a vision of her mother, she tells Neri that it is ""her time"" but Neri admits that she is afraid of what is to come. On the Ocean Planet, Shersheba is taken prisoner by Garron, on Malakat's order, upon arriving. She tells Garron that she has brought the cure to the virus—but will only release it if she is recognized as their leader. Neri stops at ORCA to discuss with the Bates family her plans to go to the pyramid. Neri asks Helen, who has been in contact with the underwater pyramid, to ask it to allow her to enter the pyramid undetected. Through Helen, the pyramid directs Neri to the ""cave of light"" in the outback. In the underwater pyramid, Malakat orders the pyramid to destroy ORCA, but soon after Neri and Jason arrive and start the process to destroy the pyramid. Just as they are about to finish, Shalamorn enters the central chamber and retakes control of her pyramid.