The Doctor is unable to fight this new life form, and when Liz and Osgood try to cut it to pieces using the time bridge, the pieces reconstitute on the other side and attack them. They are forced to flee beyond the interface, but begin to fade away once outside the time bubble. As the Constitution prepares to devour its passengers, the Doctor realises that his only remaining weapon is the third ampoule—the most dangerous and valuable of all, which releases the full potential of any life form which consumes it. He is unwilling to risk the consequences of his drinking it, fearing what he might become—and before anybody can stop her, Amelia grabs it from him and drinks it herself. The shock of the chemical transformation kills her, but her faith and the powers of the transformation enable her to survive beyond death, turning her into an angelic being with all of the powers that implies. The new Amelia subdues the hybrid life form, and promises to care for it until she can find a way to separate Nancy and Brokk once again. Realising that she no longer belongs on Earth, Amelia bids farewell to her tearful father and sets off to explore the Universe and try to understand her new purpose in it. The Doctor and the UNIT team return to London to find that, apart from a few newspaper headlines regarding the fate of Grover's expedition, history has returned to normal.