Callan S00 E01 Wet Job

"David Callan, only good at one thing, well maybe two, killing people and collecting toy soldiers."

Ten years on, David Callan hasn't changed much. Retirement has brought a new identity, a new mistress, and a new business in the form of a militaria shop. But once a secret-service operative, always a secret-services operative, as he discovers when a call summons him to headquarters and a meeting with the fourth 'Hunter' of his career. Callan thought the past was dead and buried - reactivating it is no pleasure, but it has to be done.