[River's not surprised to hear Rose express worry for the Doctor first, over herself, but she does sigh mentally. When will he stop kidnapping and brainwashing young girls?

Still, she smiles back at Rose, not letting her pleasant tone slip.]

There are, but I'm afraid you'll be hard pressed to use them to return to Earth. As far as I can tell we're not even in the same quadrant. In any case, I wouldn't worry too much about your travelling companion. If he's let you come here alone then you deserve far better.