A high-speed chase through the streets of London ensues when Christine Johnson and the military invade the ARC in search of a mysterious artefact. Forced to take refuge in an old hut in the woods, Abby, Sarah and the team's sense of safety is short-lived when an anomaly opens nearby and they find themselves besieged by giant terror birds. Elsewhere, Jack faces trouble of a different kind when he hosts a game of poker. Hannah Spearritt, Laila Rouass and Robert Lowe star