It seems so long ago that I played the part of the Doctor.

I've played so many different parts in the last 40 years.

I think space will be conquered through the mind rather than the clumsy medium of space travel.

I believed totally in the possibilities implied in the series. I never thought of it as fantasy. Far from it.

The best part about being married is feeling centered. Nothing else matters so much as long as you can come home and be with your family.

I'm often shocked by what I see. There are days when it seems unendurable. I'm a doctor, but I'm also a human being.