Agree on the story arcs, the only similarity between the two is revisiting old enemies/allies we haven't seen or heard from I'm awhile [Ponds Life had the Ood]. and now seeing as weeping angels may show up this may be a theme.
This season almost seems like it could play out as an exit for Smith too.
I've been listening to Doctor Who story podcasts by the darker projects and they mentioned he can only regenerate 12 xs, I must have missed this revelation early on, so we only have 2 more Doctors left after Smith.
Shaw how dare you forget Tennant
