The Doctor is pacing as he tries to work out what's going on. "But wrong universe. The wrong energy. It's like pouring diesel into a petrol engine. So how is 'Q' keeping her - them - alive?"

He is fairly certain KITT will appreciate the fuel analogy. But that makes him pause. He stares KITT down. "You indicate you know what she's feeling. How? I don't know for sure, I'm only able to guess because we've been together for so many years. But you know! How?"