Answering Fire - In a suspected terrorist attack on a London hotel a government minister is killed. As Sam and the team investigate the case, old friends and government officials soon muddy the water　　Fatal Error - When two brothers are found dead in a police cell, Sam and Leo find themselves on opposing sides of an Old Bailey court case – then a 13-year old murder resurfaces, questioning Sam’s findings…　　Running on Empty - When a young woman falls to her death, the police believe she took her own life. When Sam, Leo and Harry are called in, their investigations soon unravel a tragic story.　　Beyond Guilt - As Sam investigates a brutal murder, she is also asked to investigate a professor linked to the case and discovers the case is a lot more complicated than first appearances suggested.