ROSE: They all speak English.

DOCTOR: No, you just hear English. It's a gift of the TARDIS. The telepathic field, gets inside your brain and translates.

ROSE: It's inside my brain?

DOCTOR: Well, in a good way.

ROSE: Your machine gets inside my head. It gets inside and it changes my mind, and you didn't even ask?

DOCTOR: I didn't think about it like that.