Episode 4 Discussion [rewatch]

[Silktie]

The sense I got from both Salter and Marks was that they were disillusioned with England's diminishing role and status in the world, and started to wonder why they should continue to labour to uphold this fading country. They just handled it differently, whereas Marks turned into a ruthless crook who did everything for financial gain, and Salter went searching for blind idealism and found it in the shape of the girl. It's interesting that neither proclaimed disillusionment with the job of MI5 specifically, or some of the less than moral things they no doubt had to do as intelligence officers to rationalise their traitorous actions. Cause let's face it, both of them were traitors in the end.

And I wonder what made Tessa think that Zoe would possibly join her in her nefarious scheme about the ghost sources? We've seen nothing from Zoe to date that would indicate she is overly interested in money. Is Tessa banking on Zoe's admiration for her as an older and more experienced officer? Wonder if they'll explain this later.