Nostalgia
Martha stopped in front of the doors to the Tardis. She looked, she felt and she remembered. "Your ship's made from wood." It seemed like so much time had passed since she first said those words, since she first touched the Tardis. And it felt even longer since she walked out of them for the last time, with a promise to ring The Doctor. So much had changed since then. Her family, her job and mostly Martha herself. She had become stronger, more confident, more mature, older. And yet, despite all that, she couldn't bring herself to step back inside the small blue box that she had once called Home.
She laid her hand on the door, slightly pushing forwards. Why am I having such a hard time doing this? It's a door, open it! She pushed harder, and the door slowly opened, revealing the familiar sight of the main room of the Tardis. It hadn't changed since she left. It was still large and intimidating, but strangely warm and inviting. And it all came rushing back. The old feelings of excitement. Just escaping a horrific death and charging into the Tardis, wanting to rest but wanting to find some other danger on some other far-flung distant planet. The second of anticipation before flinging open the Tardis doors and seeing what was outside.
Martha slowly made her way up the ramp towards the center of the room. She slowly reached outwards, prolonging her touching of the Tardis controls. She slid her hands over the rough surface, which was always new, always changing, new parts appearing every day or so. She slowly walked, her fingers trailing along behind her. She had missed this so much. The Tardis, the excitement, the Doctor...but she couldn't stay. No matter how much she missed it she couldn't. Tom... She had left one Doctor and then found another. But she couldn't leave Tom, it'd be unfair. So I'm just going to make sure they don't ask me to join them...
She sat herself down on the make-shift sofa and closed her eyes. I could join them again though. Tom is in Africa and the Tardis can travel in time after all. Just one trip. She laughed to herself. Just on trip had turned into three. And then so many more. No, if I say just on trip, I'll end up going on two. Then three. Then many more. And I can't do that. I'll so my good-byes then check in on my family.
She stood up from the sofa and looked around, letting the nostalgia wash over her.
"Miss Martha Jones..."
Martha turned around, seeing the Doctor enter the room from some other place deep in the Tardis.
"That's Doctor Jones, remember?"
"Of course." He smiled. That smile...
"So, will you be joining us?"
"Well..."
The Tardis doors opened behind them and Donna Noble strode in.
Make him happy, Donna. Do what I couldn't.