With the nation in the full grip of the crisis and experiencing the worst blackout in the history of the UK, Sutherland and his team are forced to work around the clock to restore power. Meanwhile Anna reconnects with Edin, but this dalliance with her past love becomes more dangerous than she anticipates.
Elenco: Robert Carlyle , Victoria Hamilton , Richard Dormer , David Haig , Marsha Thomason , Lucy Cohu .