[spoilers] Lucas. Just Lucas.

[BoHenley]

I'm sure Harry knows.

And I'd say the reasons are linked to Vaughan (obviously) and their past "job," the Albany file, the Chinese, and possibly the reasons why Harry "left" Lucas in prison for 8 years (to take him off the radar?). Vaughan must've been MI5 at some stage, hence his "A" file.

If Harry has any control over the situation, then Lucas's character should continue into S10. I REALLY REALLY hope so. He's such a complex, flawed, compassionate, maddening, ruthless, and yet at times almost pitiful character. RA plays him so well. Wonderful stuff!

It's so exciting, isn't it? And we're only half way through (I can't stand it!)

(Is there a smilie for "biting one's nails off"?)