After an earthquake causes some damage to a nuclear power station, one of the chief nuclear physicists, Paul Brack, starts to investigate the safety procedures and policies of the station. He is dismayed to discover that there is a lack of real safety processes at the station, and quits his job in disgust. His disillusionment puts a strain on his relationship with his wife, Pat, a fellow researcher and academic. Through a mutual friend, Brack meets and begins to work for energy consultant Harold Harlan, with hopes that Harlan can highlight the issue of nuclear safety, and explore alternative energy sources. Unfortunately Harlan has his own plans for how he can use Brack.

During WWII, the United States set up army bases in Great Britain as part of the war effort. Against their proper sensibilities, many of the Brits don't much like the brash Yanks, especially when it comes to the G.I.s making advances on the lonely British girls. One relationship that develops is between married John, an Army Captain, and the aristocratic Helen, whose naval husband is away at war. Helen loves her husband, but Helen and John are looking for some comfort during the difficult times.

The lives of Bodie and Doyle, top agents for Britain's CI5 (Criminal Intelligence 5), and their controller, George Cowley. The mandate of CI5 was to fight terrorism and similar high-profile crimes. Cowley, a hard ex-MI5 operative, hand-picked each of his men. Bodie is a cynical ex-SAS paratrooper and mercenary whose nature ran to controlled violence, while his partner, Doyle, comes to CI5 from the regular police force, and is more of an open minded liberal. Their relationship is often contentious, but they are the top men in their field, and the ones to whom Cowley always assigned to the toughest cases.

When his brother vanishes without a trace, American Robert Stone goes to his last known location: a remote English village. Robert's investigation leads him to the mansion of Jonathon Lanceford, a man obsessed with the Gothic works of Edgar Allen Poe, and his beautiful and enigmatic niece Dominie...

The working-class Smiths change their initially sunny views on World War I after the three boys of the family witness the harsh reality of trench warfare.