Dr. Alan Vickers, whom Kyle and Brett helped escape, has been campaigning throughout the United States to get public and world opinion to force the PCD to let his wife and daughter emigrate. The problem is that in his speeches, he might have let clues drop that may lead Skardon and the PCD to Kyle. When the PCD goes after Kyle's family, and a plot to frame Kyle blows up in the PCD's face, Delly Lomas goes to America to persuade Dr. Vickers to return to England to testify against Kyle in return for exit visas for his wife and daughter. Soon Kyle finds himself on trial, with the man he helped as the main witness against him.
—Tony Scheinman