Imagine the perfect American town... beautiful homes, manicured lawns, children playing safely in the streets. Now imagine never being able to leave. You have no communication with the outside world. You think you're going insane. You must be in Wayward Pines.

Callan is the title of a British television series set in the murky world of espionage. Originally produced by ABC Weekend Television and later Thames Television, it was aired on the ITV network over four seasons spread out between 1967 and 1972. The series starred Edward Woodward as David Callan, a reluctant professional killer for a shadowy branch of the British Government's intelligence services known as 'the Section'.

The assassinations of Nazis, terrorists and Iranian nuclear scientists have given the Mossad a fearsome reputation that has come with a moral cost. For the first time, former spy chiefs and operatives discuss personal and operational challenges, ethical dilemmas, and the personal price they were forced to pay.