The Doctor is In. And how!
The first thing to notice is a funked up new theme tune. Donna is back as the new assistant for S4, and isn't as annoying as the Christmas Invasion, I actually ended up liking her.
Watching the Doc and Donna in the opening scenes, magic writng.
The Doc has a new gadget, it's an improvement over the sonic screwdriver too
Bernard Cribbins as Grand-Dad, who also appeared in the last special.
Sarah Lancashire as this weeks 'villan' wonderful.
You realise that since Rose went, and Martha left to go home, he's lonely, as someone who claims to prefer being alone, he likes to have someone with him. In previous incarnations he would show off his brilliance, in the Cris Ecclestone series, he did that too, but when Tennent took over, he realised he had someone who could think differently, then Marhta who wasn't impressed with his intellegencwe, and showed she was just as smart too, now how will Donna fit in?
"The fat just Walks Away" awww Cute

And almost the last scene, Oh My Frelling Gd!!!!!!!!