Investigator Lily Thomas understands that Elliott is never going to divulge anything of value in a conventional interrogation process so she manipulates him.

Elliott rattles Blunt’s cage to make him panic and then follows him to a clandestine meeting in the middle of the night.

Lily has forced Elliot to remember more than he perhaps ever wanted to about Philby. Months later, Elliott receives a letter from Philby asking for a meeting in an East Berlin bar.