To Whom It May Concern:
In some ways, writing this letter is a little morbid, as it presupposes an ending. But endings come upon us, whether we want them to or whether we don't, whether we are ready for them or whether we are not. And, when I met Sarah-Jane, I learned that there were others before me and that has led me to thinking about those who will come after me -- like you -- and it led to this letter.
My name is Rose, and I used to travel with the Doctor, too. Sarah-Jane, whom I mentioned, traveled with him too, a long time ago according to his linear time. And now there's you: the new companion. Welcome to the TARDIS. Yes, it's bigger on the inside. Yes, he likes to stroke and occasionally smack it. Yes, she's a sentient machine and she gets into your head. I think that about covers the basics...
Where was I? Right. Welcome to traveling with the Doctor. It's going to completely change your life, your way of living and even the way you think about pretty much everything. If you're open to it, it can be the best experience of your life. I always promised I'd stay with him forever, but the fact you're reading this means I'm gone. However long you choose to remain with him, live it fully. Whoever you are, you owe yourself that.
You also owe it to him. The Doctor is, a lot of the time, a deeply lonely person. Yes, he can be manic and eccentric and so completely extroverted that you'd never think for a moment that he knows what silence sounds like... but that's only a part of him. His planet is gone; he's the last of his kind. The rest of that story is his to tell, but I'll give you that one as a freebie, for his sake. Remember that about him and you'll understand the privilege it is to travel with him.
He chooses you; you don't choose him. If you think otherwise, it's because he's letting you, probably because it amuses him to do so. Let him have his amusements, but don't let him push you around. He won't like or respect you if you let him bully you too much. But don't ever forget who drives this magnificent time ship that you and I have come at different times to call home.
Whether he ever mentions me or not, I was here, and I loved it. This letter is, I suppose, my way of passing on the important things I learned -- and my way of looking out for him when I'm no longer there to do so. I'll warn you now: it is breathtakingly easy to fall in love with him.
Staying in love with him is harder, because sometimes, he'll scare you. Sometimes he'll push you away and sometimes he'll cling so hard you're afraid to breathe for fear of breaking him. (Not that he's super-fragile or-- you'll understand in time.)
I suppose that's why I'm writing this. I do love him, with everything that I am. Who knows, you might, too. That's fine with me. I'm not jealous of companions from the past or yet to be. If anything, I rather want you to love him and want him in your life, because that means that you'll take care of him, too. He needs people in his life, even though he will likely try to push you away.
The Daleks (his people's enemy since pretty much ever; kind of look like scary, homicidal pepper-pots; tend to shriek 'exterminate' a lot) have a name for the Doctor in their language -- and it translates to 'The Oncoming Storm'. It's apt. In many, many ways, it's apt. Be wary, but stand your ground.
Your Mum, if she ever meets your strange new friend, is going to hate him. Just a warning.
He likes his tea to be two-thirds tea, one third milk; not very strong; five sugars. Preferably with a chocolate biscuit on the side. He has a fondness for bananas. Oh, and a serious oral fixation. I'm warning you now, he will lick the strangest (and sometimes most disgusting) things.
Oh! One thing that completely caught me off guard when I went through it with him. He 'regenerates'. It's this thing that Time Lords (his people) do in order to cheat death. Rather than dying from a fatal injury as you or I might, when he's fatally injured, every cell in his body kind of goes into flux. There's big golden flashing lights, and when it all stops, he looks different. And acts a bit different. It's like he's a completely different person, except that he's not. He's still the Doctor, but -- but different parts of his personality will be more emphasized than others. It's completely weird and worrying and disconcerting at the time, but you do get used to it. I promise.
I need this one thing from you, in return for the pointers I've given you here: I need you to look after him for me. Even if it's just for a little while. If I could, then I would never leave him. I'd follow him through eternity and beyond, across time and space, but I
can't. I'm just human and mortal, and he's a Time Lord. He's going to live, if not forever, then for a very, very long time, and I'm not. When I'm gone, he'll need someone else to cast a light into his shadows, and I need to know that someone out there will be able to do this.
Oh, he could make it on his own, I know that. He's a survivor. But this life? Journeying across the universe and throughout all of time? It's better with two.
I'm entrusting this letter to the TARDIS for you, and I know she'll give it to the right person at the right time. And I need you, whoever you are that is reading this letter, to step up to the task and hold his hand. If you can do that, then, even though I will probably never see your face, or laugh with you, or cross the universe by your side, I want you to know that I love you for it and that you have my eternal gratitude.
(As for showing him this letter? You may, if you want to, and you feel that it is right to do so. The last thing I would want would be for this to make him sad. Use your best judgment. I trust you.)
Again: please take care of him for me.
Love, Rose Tyler