The kiss shared between Rose Tyler and The Doctor in “New Earth” was an unscripted kiss. There was no need for Billie Piper to kiss David Tennant in the scene, but she still went for it. You can see that this was obviously surprising to David Tennant judging by the look on his face. They also talk about it in the audio commentary:
David: That’s me kissing Billie Piper. Russell: Hurray. David: Yeah. Russell: Completely unscripted they just- David: I know, she just couldn’t help herself. [x]
I haven’t made my mind up. I’ve been asked to stay on, which is lovely. And I think Chris Chibnall is fantastic and is a wonderful choice. To be perfectly honest, it’s so far away in the future…You know, Doctor Who is a very difficult thing to say goodbye to. And I don’t want to make that decision right now. I don’t know yet. I mean, they’ve asked me to stay on. So when I’m forced to make that decision, I will make it.
Peter Capaldi on BBC Radio Scotland on whether he will continue on Doctor Who after Series Ten.
(via andrealaford)

