The film's ending was directed by the Laurence Harvey who also directed some scenes shot in Berlin. Anthony Mann directed all of the scenes in Surrey and London as well as some of the Berlin scenes.
Gatiss: I don't like you, Eberlin. I don't like you because you're weak and dishonest. But even more, I don't like you because you're frightened of me, and that disturbs me. I want to know why. You can tell me; I'm a very understanding man.