Relativity

We sat.

For a long time.

Trying to understand

how the Doctor
traveled to all those places
in all those times -
sometimes running into himself
or other people.

The math and physics were
over my head, I knew.

But I knew my own little
theory of relativity.

Mom said she would leave town at four.

She called to say she was leaving at five.

She called to say she was really coming at six.

At nearly seven she walked through the door.

So it is really very simple:

take her estimated time and add three hours.