Because of this and unknown to everyone in the unit, his letter is ignored back home and sarin disregarded as a false rumour. Under Strasser and Lockhart BFC is slowly taking shape. Lockhart sees letters from his wife that are typed but does not believe they are real. He tries to make a deal with Strasser to see his wife but agrees only if the BFC meets training requirements for the Russian front. A deal he says he can break or change at any time. Meanwhile, Lockhart presses Andrew Worstead about his joining the BFC and about whether or not Anna's letters are real or if she is dead or alive. Worstead claims that he joined the BFC to infiltrate and destroy the unit in order to become a hero back home. He also says that he suspects Pugh is collaborating with Strasser to forge the letters from Anna and keep an eye on the unit. Lockhart meets up with members of the SS and other Nazi party officials to try to learn the truth about sarin. He learns that the gas might be a project in the Ahnenerbe a German think tank that deals with race theory. With the help of Strafford (who had been a burglar before the war) Lockhart infiltrates an office in the Ahnenerbe and discovers a file of the A4 project. Later at a bar in Berlin he meets Pugh with Leni Steiner. Pugh reveals that he is no longer a fascist but is a Russian spy with Leni. He tells him that the story of Worstead being demoted and voluntarily joining is not true. In reality Worstead was a homosexual who's orientation was discovered in POW camp. He was shunned and later forced to join the BFC or be sent to a concentration camp. Worstead's orientation was later discovered by Pugh who blackmailed him. Worstead it turns out is the real spy for Strasser and that he was the one writing the letters from Anna. Lockhart confronts him and Worstead confirms most what Pugh had said but claims the letters were written by a British Nazi who is the son of the organist at John and Anna's wedding and that Anna was dead. He later kills himself. Lockhart is accused of murdering him and is arrested. Strasser initially refuses to release Lockhart saying that it was nearly impossible. But When dating Leni at a hotel, he is forced at gunpoint to release Lockhart. Leni reveals herself as a spy for the SD and tells him he must obey Lockhart and give him what he wants or she will inform the SD that Strasser is a traitor and have him beheaded.