Grover has the Doctor, Liz and Mike locked up on the Constitution, promising to release them before the volcano erupts so they can return to their own time. The Doctor, however, refuses to help Sternberg open the vials, claiming that the human race is not prepared to handle the alien technology within. Amelia, who believes that the loss of her arm is a test from God, accepts the Doctor's argument and refuses to take any of the drugs even if Sternberg somehow manages to open the vials. Meanwhile, Nancy, knowing that her marriage to Grover is effectively over, seduces crewman David Ferraro and convinces him to steal the giant's ruby eye from the pit. When he fails to return, she goes looking for him—to find that he has been hypnotised by the ruby eye and is building a fire in the pit. Before Nancy can respond, the heat restores the giant to life, and it hypnotises her as well. The smoke from the fire attracts the attention of Grover's men and of Benton's search party, but when they arrive, the giant, Brokk, holds Nancy hostage and uses her as its telepathic go-between to demand the return of the ampoules. He had stolen the vials from the Semquess, but they shot down his ship and he crashed on this relatively cold planet, losing one of the ampoules in the process. He drove away the natives of the island and installed the force field to prevent the Semquess from finding him while he repaired his ship, but first he went searching for the missing ampoule and fell into this pit, damaging the heat exchanger of his survival suit. He has been trapped, dormant, for fifty years, and in the intervening time the Semquess have tracked him down. The miniature tanks are the Semquess’ life support units, they have been taking samples from the island to determine whether their drugs are responsible for the growth here, and it was presumably a Semquess tank which struck the Constitution in the lagoon, damaging the ship.