While on vacation with her two male cousins—they were traveling around the galaxy to celebrate her birthday—they ran into some trouble. Her two cousins contracted a fatal disease, and they and she were frozen into stasis to be used for organ donation by a Diagnosan. This Diagnosan was later able to remove John Chrichton's neural chip, though the procedure required removing some of his brain and replacing it with a closely related donor species. Interons, like Jool, had the closest physiological match to a human brain, and Crichton reluctantly was saved through a donation by one of her cousins. He later took her and her other cousin's stasis capsules with him onto Moya. Her cousin died almost immediately upon being released from stasis, but Jool, who had not been sick, was fine. She awoke to find herself aboard the Leviathan Moya and discovered that she had been frozen for 22 cycles.