Spooks

Hey Guys, I don't know if they run it in the US, but in the UK there is this TV series called 'Spooks'.
It's amazing! I just watched the most recent episode on BBC iPlayer. It's only the 3rd episode I've watched but, omg, I :love: it!
Anyway, I was wondering, in the last scene, who does Lucas confront at his girl friends house? What's his background?
Thanks Guys
If you've not watched it, you can watch it on BBC iPlayer.co.uk

 

Yeah it's a nice show! I watched the whole first season back when it first came out. Quite a long time ago... I should start watching it again.