Katherine and Max in “Unfinished Business”

Katherine

So what am I looking at here, hmm, blood clot, tumor, what?

I did a full workup on your blood, Katherine. It's clean.

Katherine

My hair is going gray, and my teeth are falling out. I'm not sure what the suggests, but it's definitely not health.

Patient is irritable. Not sure if this is a symptom or personality.

Katherine

(breaks the recorder) Personality. Now tell me exactly what the hell is going on with me.

You're aging.

Katherine

What?

You said you were turned into a vampire 500 years ago, give or take, and now that your human, let's say time is catching up with you.

Katherine

Ok. Ok. Well, how do we stop it?

We don't. It's just life running its course quicker than normal.

Katherine

How much quicker?

If it continues at this rate, you have a few months. I'm sorry.