Titre original : The Fat Lady's Singing
All the kids have arrived at Dr. Hamilton's base and they hide in a big storage room while Lily, Em, Josh and Saskia goes searching for their parents and Ryan and Gabe goes searching for Dr. Hamilton. Lily and Em finds Gabe's mom, and Eli finds Gabe and Ryan but he says that Natasha is the one who wants the antidote because he has tried one of his antidotes on himself and he's dying. They manage to get to him in time but Eli wants a drop of the antidote but when Natasha says no, he steals it and runs away. Lily finds everyone's parents locked up in another storage room and with Saskia and Josh they release everyone and reunite. Meanwhile Natasha and Ryan get on a boat and chase Eli and drive him back to shore where Ryan tackles him to the ground and almost all the antidote spills out. There is only one drop left and Natasha uses it to save her dying father. Dr. Hamilton wakes up and apologizes to his daughter. Ryan and Natasha then hug and kiss and the episode ends.