John Porter

Porter is a soldier of the Special Air Service (SAS). In 2003 he took part in a botched operation to rescue Kenneth Bratton, a weapons contractor held hostage in Iraq on the eve of the American-led invasion, where two soldiers were killed and a third left in a persistent vegetative state. Porter was blamed as they suspected the killer was a 13-year-old hostile, As'ad, and Porter failed to kill him. As a result, he resigned a disgraced officer, he could not find suitable employment, and became estranged from his wife and daughter. Seven years later, he is drafted back into service to work for Section 20. He ultimately learns that the boy, was not the killer.