Hey! This is my very first Fanfiction, and I hope you'll enjoy this little one-shot of the 10th Doctor. This has been buzzing around my mind for quite some time now. Post-Waters of Mars. :)

Disclaimer: I, sadly, don't own Doctor Who. It belongs to the wonderful, amazing BBC. :)

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The Doctor took a deep, steadying breath. The impact of what became of him shook him hard. Before, there had been someone to stop him from going too far, someone to push him in the right direction. Donna had stopped him from going too far when he watched mercilessly as the Arachnos and her children drowned. Donna. The thought of the way he left her, deprived of any recollection of the Doctor, restarted the series of shivers.

All he wanted to do was see the universe. He took one person along, not wanting to be alone. One person to show the universe and her wonders.

But it was more than that.

He's always known that he was powerful, that aliens from Sauntarans to Cybermen to Daleks cowered at the thought of his name. However, the Doctor also knew that time and space was infinitely bigger than him. And he had tried to best it. Changing a fixed point in time was a taboo, a big no-no, and yet he felt so invincible, like space and time must bend to his will, and he dearly paid for his actions.

The Time Lords were powerful. So, so powerful, as the masters of time.

If they're so incredibly powerful, and he's the only one left, wouldn't that make him THE Master of Time and Space? A Time Lord that's The Lord of time?

Power, the Doctor knew, can corrupt people. It can mold people into hideous creatures of darkness and evil. With all the power he had, he knew he had to control himself, not let that power go to his head. To overstep his position would mean the end of the universe.

To overstep would mean to turn into a psychopath, like The Master. The Doctor shook his head at that thought. His companions were the ones who prevented that from happening. His wonderful, loving companions, so full of emotions that only humans can express. The Doctor needs someone like that by his side, to show him how to be human.

And yet... Whenever he brought a companion along, they always end up leaving him, taking along a piece of his hearts. Rose, Martha, and Donna, to name the most recent. He took them along, and ended up tearing their life apart. Rose and Donna are lost to him forever, one trapped in a completely different universe, living out her life happily with a Doctor-but-not-Doctor, another with a head full of wonderful memories of the universe and the Doctor, trapped in the corner of her brain, unreachable. And Martha. Her life torn apart all because the Doctor brought her into his too deeply.

It seems like everything the Doctor touch turns to dust, the memories blowing in the wind, scattering off into the universe.

The TARDIS hummed in sympathy toward the Doctor. She's the only one who has stayed with him the entire way. The one true companion of the Doctor. The old girl knew the Doctor like the back of her hand (if she had one). And She knew that this Doctor had no one left.

At this heart-wrenching thought, the Doctor sprang to life. He had to do something, ANYTHING, to keep from breaking. He is the Oncoming Storm, the Last of the Time Lords. He could not, WOULD NOT, break.

He would keep running, his worn-out converse pounding the ground as he ran from danger, and, more importantly, his past.

Flipping switches, pulling levers, and hammering the occasional malfunctioning button, the TARDIS spun off into the time vortex like a big, wooden, rectangular top. This is not the Doctor's day to die.