When Erdogan's defence barrister commits suicide, Martin Rose is appointed by the Attorney General to replace him, joining special advocate Claudia Simmons-Howe.

Martin discovers that despite his extensive criminal record, Erdogan was somehow quickly approved for immigration from his previous residence in Germany to England and within six months was living well beyond his income.

He finds proof that Farroukh Erdogan is really Mussi Kartal, a member of a terror cell responsible for bombing a U.S. Air Force base in Munich a few years previously.

Martin suspects that after the Borough Market bombing, MI5 feared their botched operation would be publicly blamed as directly financing terrorism and sought to have Kartal take the fall and suppress any evidence of MI5 involvement.

In the first closed court session, MI5 Agent Melissa Fairbright reveals that Kartal's son Amir had hacked into his father's laptop and had provided valuable information to MI5.