Following the disastrous party at the Parsonage, Jack loses his security clearance and must strike a dangerous bargain with Wallace to be reinstated. With the police now investigating the Agape, the members' deepest secrets are revealed through a shocking betrayal. Meanwhile, Richard, Chiang and Mesulam are sent to London for a military research project, where Richard goes to great lengths to clear Jack's name. Devastating truths come to light, putting Jack and Susan's future in doubt, and creating the opening that Patty has been looking for.

• Mark Heyman

• Rupert Friend
• Rade Šerbedžija
• Jack Reynor