MASTER: Time. It takes its toll on all of us in the end.
HARRY: Even a Time Lord?
MASTER: Especially a Time Lord. We live too long.
HARRY: Are you much older than the Doctor?
MASTER: No. We are the same age. That horrifies you?
HARRY: No! Well, no, it’s just… he seems so young in comparison.
MASTER: Time has been kinder to him.