An unexpected meeting with Himmler and Huth's boss, Professor Springer, underlines to Archer why the SS so desperately needs to track down the elusive Dr John Spode. When Archer finds himself unwillingly dragged into the resistance's plans, Huth endeavors to swing Archer's allegiance to the SS cause. Whose side will Archer choose?

With the army imposing martial law and a rounding-up of Resistance members, Archer faces life-changing decisions. Barbara's surprise proposal could provide a safe haven for Archer and his son, but can he really trust her with the country's most sought-after possession? Despite being caught in the middle of a battle between Kellermann and Huth, will Archer finally agree to help free the King?