Disclaimer: I don't own doctor who nor have any rights to any of the characters.
IWhy am I doing this again? I'm not doing anything, she helped me so I'll return the favour it'll help give her a bit of perspective. It's just the one trip. Your kidding your self you say that but you know that after that you'll come up with a reason to keep her on and then by the time you do get round back here she'll want another trip and you'll want to give her one. It'll be just like every other time she'll end up stuck on earth dreaming about the stars and you'll be lonely so pick up some one else. Get your head on straight. Now you're just showing off. Why is it you never seem to listen to your self? You just ignore me unless you really have to and spend your time showing off the TARDIS. You're like a teenage boy with a new car. No, correction you're worse because you actually have something to show off. It'll be different this time the others weren't like Rose. I won't just forget Rose and take her on. I can't do that if I forget her she's dead and the words on the roster are true, but she's not she's alive and well; just not here. I can keep control this time it'll be one trip then straight back. I
Just as he's asking Martha to come along with him and proving that it can travel in time.