DOCTOR: I’m looking for my granddaughter. She attends this school…

SHIVANI: What’s her name?

DOCTOR: Susan.

SHIVANI: We have quite a few Susans. What year is she in?

DOCTOR: 1963, madam. The same as you and I and everybody...

SHIVANI: No. I meant… How old is she?

DOCTOR: Ah. She is 73 years old.

SHIVANI: Are you…

DOCTOR: Worried? Of course! She mustn’t try to walk home through that!