Hamilton returns to Sweden, starting off his homecoming with meeting Sonja. Kristin and Birger make progress in the hunt for the terrorists and discover that they are hiding on a ship headed for Germany. Hamilton sets up a secret meeting with his CIA-boss, Haig. DG and his colleague Astrid begin to investigate how the murder of Elena’s boyfriend Borisov is connected to the terrorist attacks. DG gives Hamilton a mission to infiltrate Borisov’s office at the Russian embassy.