Granger, an ex-Special Forces soldier gets thrown back to medieval times to fulfill an ancient prophecy. Venturing through the now war torn Kingdom of Ehb, he teams up with an unlikely band of allies with the goal of slaying the leader of the "Dark Ones". Fighting against all odds, they must free the land from the grasp of the evil tyrant Raven and save the world.

Tense drama series about the different challenges faced by the British Security Service as they work against the clock to safeguard the nation. The title is a popular colloquialism for spies, and the series follows the work of a group of MI5 officers based at the service's Thames House headquarters, in a highly secure suite of offices known as The Grid.