Which person should join Spooks?

[almh]

I had this discussion with my mum before series 8 started, but the problem is that I really don't watch enough tv to see more good actors and actresses, and so really answer this question. What I would say is that I think who ever joined, I'd like to see their character to be newish to the whole world of spies, but not new. Maybe they're on secondment or they've just moved from a different section. It just feels like most of the people on the Grid are old hands at this, and maybe they need a newer person.