At Alan's words, the Doctor broke into a wide grin. "Watching over your daughter, but letting her do what she's best at. That's brilliant, you know. Dealt with quite a few parents who'd rather pull their children away, keep them from doing what they know is right. But you, you just want to help. I love it!"

Now, if only he could've managed to have a parent for his companions like Alan, rather than Jackie, Francine, and Sylvia. Well, Francine wasn't so bad, once you got to know her. Sylvia still had claws and fangs.

"Isotropic energy conversion stabilization utilizer," the Doctor explained. "The energy signal is caught by the psychic waves in the crystal, and converted to power source output registrations here."

Beat.

"And there's no radiation or fumes, so far as I can tell."