Christopher receives some shocking news, Lynne and Carl go head to head, and Mark finally discovers what's really been going on, as the drama reaches its thrilling conclusion.

Mark's political future is on the line, but could he be about to receive help from an unexpected source?

Mark embarks on a delicate diplomatic mission, while Jane uncovers some new evidence.

As Washington witnesses an evening of sickening violence, Mark attempts to resolve the crisis.

Mark lobbies for a change of policy in Virginia, where British civilians are being apprehended, but faces opposition from Lynne Warner.

A British man on death row fights for his life, a terrible explosion tears apart the alliance between Britain and America, and a group of British mercenaries lays a trail of destruction.