Which Actor/Actress would you like to see in Spooks...?

[BravoNine]

I don't see why casting has to be chosen by nationality, British, American, Australian, I could care less as long as the actor/actress is good.

I would like to actually see John Barrowman, maybe he and David Tennant can be like a duo of evil-doers that wants to take over the world or something, I mean, those two both share this crazy maniacal energy, it would be fun! Goodness knows they may actually bring some much needed levity in Spooks!