S01E12 — Revenge for a Visitor

"Leave me alone! I don't want you near me! You've been watching, listening, all these months. You're just another spy." In the last of the current series. James Austen finds himself caught up in the strange case of a Polish girl living in London who appears to have become terrified by sudden explosions of family hatred. For Austen, the frightened Irena is strictly a private patient, but for Dawnay, she is the beginning of a trail which leads him to a deadly plot of political revenge.