London is under siege as Blackwood's killing spree escalates and Father Dennis becomes a public pariah. Meanwhile, Hicks has deduced where Renko has hidden the Hard Sun flash-drive.

Cast: Jim Sturgess, Agyness Deyn, Nikki Amuka-Bird, Derek Riddell, Jojo Macari, Varada Sethu, Owain Arthur, Joplin Sibtain, Adrian Rawlins, Ukweli Roach, Sam Alexander, Aisling Bea, David J Biscoe, Noah Maxwell Clarke, Richard Coyle