Sir Michael Marsh: Gas, oil, coal... They're too expensive. And one day they'll run out. But uranium is incredible stuff. One tiny piece of it, if you held it in your hand, has enough power to keep a million electric heaters running non-stop for twenty-four hours. Father Gregory is an antagonist in book four, Necropolis. His birth name is Gregor Malenkov. He is the leader of the Monastery of the Cry for Mercy in Ukraine. His monks capture Scarlett Adams when she steps through the door at St Meredith's Church. He tells her that he was born in the Soviet Union and when he was nineteen entered a seminary in England. Gregory became cynical of his teachings, as he lived a life of hardship with nothing to show for it. In the monastery Father Gregory found the door and became obsessed with it.

After a celebratory dinner, the Five decide to return to the Dreamworld. Although Richard is heartbroken that Matt will leave, even though he is not the same Matt that he knew. Matt and the others leave travelling past Oblivion where the Dreamworld lies, in the frozen wastes. The Dreamworld seems to have healed and turns from shades of grey into colourful being. Matt meets the Librarian again, who has with him a woman, who appears to each of the Gatekeepers differently. For Matt she looks like his mother, on the day she left for a friend's wedding and when she died after their car fell off a bridge into a river.Professor Joanna Chambers is an expert on the history, geography and culture of Peru and the Nazca lines, introduced in Evil Star. She helps Matt, Pedro and Richard with their exploration of Peru for the second gate, and later they stay at her "Hacienda" (Farm)

In the next few weeks, a society named the Nexus, to which Dravid belonged, tells Matt and Richard that another gate is opening in Peru. Matt ends up living with Richard in York. They get a visit from Fabian, a member of Nexus, who has come to talk to him about a second gate in Peru. Richard doesn't want to go through all this again, but Matt explains he has no choice because he is a Gatekeeper and, as the Old Ones will try to break out again, it is his destiny to stop them when they do.Chaos is the King of the Old Ones and is the main antagonist of the entire series. The King was not actually named Chaos, but the ancient human resistance gave him that name, due to his motivations. Chaos seeks to destroy humanity and conquer the Earth, in doing so reshaping the Earth in his own dark, poisonous image. If he could have succeeded ten thousand years ago, Chaos would have reduced the world to an empty swamp. Even though Chaos has been thrown from the world by the power of Five, his influence still remains throughout the human race. Alicia decides to seek help from her boss, John Trelawny, who is running for presidency, and manages to convince him about Jamie's powers and to help him get into Silent Creek. Trelawny affirms Jamie's powers and agrees to help him. Jamie is given a false identity and crime and is put into the juvenile Centre. When he arrives, Jamie meets an intake guard named Joe Feather. Jamie manages to discover his brother is there in solitary confinement and Alicia's son Daniel is there too. One night, when he demands that a supervisor named Max Koring take him to his brother, he realizes that his powers do not work in the prison, because of some magnetic field that neutralizes special powers. Koring puts him in solitary confinement for his rudeness and secretly calls Banes to tell him he has found a Gatekeeper.