Department Q centres around Carl, a former top-rated detective in Edinburgh assigned to a new cold case whilst wracked with guilt following an attack that left his partner paralysed and another policeman dead.
When the crew of the Kishorn Bravo oil rig, stationed off the Scottish coast in the North Sea, are due to return to the mainland, a mysterious and all-enveloping fog rolls through and they find themselves cut off from all communication with the shore and the outside world.
This eight-episode, hourlong historical drama series is adapted from Bernard Cornwell's best-selling novels, The Saxon Stories by writer Stephen Butchard.