[spoilers] Lucas. Just Lucas.

[Beatriz]

So, my take on Lucas, I don't think he's evil or anything, I think circumstances have made him who he is right now. He is a troubled man, he has never recovered from his 8 years in a cell... I think now, he is in survival mode, he wants to hide a secret Vaughan knows and if that secret is revealed he will lose MI5 and everything he has now and his last chance to get a normal life... I guess that includes Maya. The problem is that he has gone too far to keep that secret, he's not himself anymore IMO; he's just acting desperately and he's no longer in control of himself.

Comparisons are horrible, if I've said there's no Spooks without Harry, it's because he's being there from the beginning and he's like the thread that unites all the series. As much as I love Ruth, I would never say the same of her, she's dispensable.