Following Luke Gardner's death, the letter he left for Jane Lavery takes her to Al Rivero's house in search of Luke's 'kit'. After a scary moment when a nervous Al pulls a gun on her Jane receives the package Luke sent her for – the package that will explain everything.
Later in her motel room she views rough, handheld footage of a massacre in Tyrgyztan eight years ago. She recognises Gary Pritchard, who murders a young woman in a Tyrgyztani village and sees Luke preventing him from murdering her baby too. Though Jane has no way of knowing it the young woman is Eshan Borisvitch's sister Saida – James Sinclair's wife and Mark Brydon's last lover. More is to come. The second DV shows Luke coaching Hassan Khan, the Washington plane bomber, in his new identity.
900 miles away in Washington, Mark picks up the threads of a delicate diplomatic manoeuvre. In darkness, surrounded by security, he meets Eshan Borisvitch, the leader of the democratic opposition in Tyrgyztan. It's clear that the two men have history.
Mark stumbles through an apology for wrongs done a decade before. He was the international envoy responsible for smoothing President Usman's path to power, turning a blind eye to human rights abuses during Usman's so-called democratic election, and indirectly creating the conditions that led to Eshan's sister's death.
As Mark hosts a lunch to broker talks between Eshan and Lynne Warner, Jane arrives with Luke's kit. In a secure room she shows Nicholas Brocklehurst the DVs and a copy of a contract between CMC and Armitage linking Armitage directly to the massacre. The signature on the contract is 'Lynne Warner', CEO of Armitage in 1999, now sitting upstairs talking to the Tyrgyztani opposition leader in exile.
Next morning the secrecy surrounding Eshan's visit is blown open when a picture appears in a morning tabloid of Mark and James staggering out of a bar, accompanied by speculation that their row had something to do with Eshan's arrival in Washington.
The fallout is immediate. Usman denounces his traitorous allies. Mark's Deputy Phil reacts with fury: what made Mark think he could defy diplomatic gravity? Warner is humiliated. Eshan reacts at once. Usman will take his revenge on the Tyrgyztani people. He must leave straight away and attempt to limit the damage.
But Mark takes a cooler view. Eshan should stay. This might play in their favour. The US can't possibly continue its relationship with Usman after this. His hunch is proved correct when Warner calls and invites Mark and Eshan to the Pentagon to talk.
Hope turns to despair when Eshan is discovered to have left the Embassy without security to meet James and Azzam. Mark has to find him. They're due at the Pentagon in an hour and with the tide in their favour they don't want to mess Warner around.
Mark sets off to look for Eshan. Nicholas follows his progress by means of the tracker dot he's placed in his fountain pen. Mark arrives at Rock Creek Park to see Eshan, James and Azzam in the middle distance. As he raises his hand to hail them a sniper's shot rings out and Eshan falls to the ground. Mark races over and cradles the dying man.
After identifying Eshan's body at the Washington morgue and sharing a moment of grief with Caroline and Gordon, his co-sponsors of Tyrgyztani regime change, Mark returns to the Embassy. The scent of disaster is about him and Phil, his deputy at the Embassy is moving in for the kill. Mark needs Nicholas, but he's nowhere to be found.
Warner seizes the moment to step up the rhetoric for war. And in Undersecretary for Defense Christopher Styles' elegant apartment Nicholas burns Luke's tape in front of his lover's shocked gaze. Knowing that he's sailing close to the wind Christopher reacts to close down the only witness who can draw the lines together, by ordering a hit on Jane Lavery.