Thoughts on bbc Torchwood/Doctor Who casting

I'll spoiler cut this just in case people haven't seen/don't want to know about who will have a guest part in Torchwood next series. All the info's in on the main bbc web site and i'm sure a fair few newspapers, so not sure how long people will be unspoilled for. But they wont be spoiler by me - unless they want to be course, but you can say you weren't warned 

( Casting spoiler based wondering )