IAN: Susan Foreman? She your problem too?

BARBARA: Yes.

IAN: You don't know what to make of her?

BARBARA: No.

IAN: How old is she, Barbara?

BARBARA: Fifteen.

IAN: Fifteen. She lets her knowledge out a bit at a time so as not to embarrass me. That's what I feel about her. She knows more science than I'll ever know. She's a genius. Is that what she's doing with history?

BARBARA: Something like that.