“ I quite like the transitions of being an actor, because you get to explore these little pockets of life. So if you’re playing a builder you get to know about building, if you’re playing a scientist or a physician or something you get to know about physics. And similarly with this world I like exploring their culture, that very sort of upper middle class, addictive… that’s part of the reason I love it.”
“When they made this particular hero, they didn’t give him a gun, they gave him a screwdriver to fix things. They didn’t give him a tank or a warship or an X-Wing fighter, they gave him a call box from which you can call for help. And they didn’t give him a superpower or pointy ears or a heat ray. They gave him two hearts. And that’s an extraordinary thing. There will never come a time when we don’t need a hero like the Doctor.” - Steven Moffat
If Rose can be selfish, then her finest moments will come when she’s selfless. If Martha keeps quiet, then her moments of revelation – like her goodbye to the Doctor in Last of the Time Lords, or stuck with Milo and Cheen in Gridlock – make her fly. Donna is magnificently self-centred – not selfish, but she pivots everything around herself, as we all do – so when she opens up and hears the Ood song, or begs for Caecilius’ family to be saved, then she’s wonderful.