One in which the Doctor regenerates in front of Rose, the Winchesters, Ruby, and the angels.
"Shut your eyes!"
It was the last sentence that the Time Lord could articulate before a massive surge of regeneration energy exploded out of his every pore, shifting his atoms, changing his face. He was becoming a new man again. And so soon, too. It felt like he had had no time at all as the gruff-looking man with the great big flapping ears and black leather jacket.
But soon enough, he was losing all thought processing, his entire soul being consumed by the blinding golden light of regeneration.
In the dark barn, everyone shielded their eyes – human, demon and angel alike. The Doctor had become a blinding ball of impossible light, and the most anyone could do was to try not to look, and inevitably fail because it was the DNA of the last Time Lord reconstructing itself and how often are you going to see that?
The light gradually began to fade, and then all at once it was sucked away, leaving a circle of human bodies gaping at the tall, lanky brunette man gasping in front of them, wearing the leather jacket that hung limply from his skinny shoulders where it used to hug the broader muscles of his previous self.
The angels of course knew who the Doctor was – the hushed rumours of the Lonely God wandering about England, hopping about time as he pleased had always been popular in the garrisons of Heaven, but it was a very different thing to actually witness the soul of a Time Lord rebuilding itself before their eyes, dodging death by adopting the body of a new man.
Castiel tore his eyes from the Doctor to look at the demon, Ruby. She was pale as a sheet, grasping uselessly at handfuls of straw from her position of cowering on the ground. Her jet black eyes kept darting around at every person, seemingly at a loss for what to do. Sam and Dean Winchester also were stunned out of their astoundingly mortal minds. It would've been almost comical, if Castiel weren't sharing the exact same feelings on the inside.
But a bit apart from the rest of the group, clutching a wooden pillar to support her jelly legs, Rose Tyler was gaping at where her Doctor had once stood. The tall brown hair and skinny build - she could've sworn that she had seen that face before. On New Year's Eve, a few years ago…