Oh, hello there. I'm the Doctor. What's your name? You may use your 20th century technology to send me a message at firstname.lastname@example.org. Don't worry about where I am at the moment, I'll be able to get your communique.
Martha: Where are we? Doctor: The end of the line. No place like it. Martha: Home… You took me home? Doctor: Back to the morning after we left. So you’ve only been gone about 12 hours. No time at all, really. Martha: But all the stuff we’ve done! Shakespeare, New New York, old New York! Doctor: Yep, all in one night. Relatively speaking. Everything’s back where it was: books, CDs… laundry.