I Don't Know What to Say, So Never Mind
by HeavensRebel
Prompt from a friend: A SuperWho starring Cass and the 10th Doctor meeting.
Post-Rose, Pre-Martha. Not really sure about SPN? Perhaps Season 5-ish. Post-The End for sure. Also, hints of Destiel.

Rated K+
Friendship

Summary: "I have heard a lot about you – the Last of the Time Lords." A Doctor and Cass Meeting Fic.
I tried so hard to keep this in character, really, and honestly I did.
Disclaimer: If I owned Supernatural and/or Doctor Who, SuperWho would have existed a long time ago. Just saying.

"Would you look at that!" The Doctor's eyes are practically alive, dancing in the low light and glowing in the moon. But Castiel is quite apt and detecting emotions that are hidden far beneath layers and layers of difference. His time with the Winchester's has prove that.

And he can tell that The Doctor is a very lonely man.

"A real live angel! I though you're race had been wiped out in the last War in Heaven?" the Doctor's dark eyes, set behind thick black frames, are scrutinizing every detail of Cass – he's not quite sure when he stopped being Castiel – and the angel thinks that perhaps this Doctor can see the wings that exist on another plane of existence entirely.

"I could say the same to you, Doctor."

The Doctor's face tightens. "Yes, well. Here I stand."

"The Last of the Time Lords," Castiel nods. "I have heard a lot about you."

"Ah. Not so much you, I'm afraid. My knowledge is actually rather limited, surprisingly enough."

"Our existence was, and is, denied, even by – " But he stops, and all the human emotions he's avoided for his entire existence choke him now. "Humanity." he finishes lamely as the Doctor stares at him curiously.

The Doctor's hands are buried deep into the pockets of a trench coat not that different from Cass' own, and the angel shears a soft whirring sound, on-and-off, almost as if the Time Lord is clicking a pen reflexively – or rather, the famous sonic screw driver Castiel has heard off. He doesn't say anything for a long moment, as the angel and the Time Lord read each other. Like they both just now.

"Would you like to see her?" The Doctor asks suddenly, a smile lighting up his features.

"Who?" Cass tilts his head to one side.

"My ship, of course!" The Doctor's dancing on the balls of his feet, dashing around the corner of the low, run-down building their conversation takes place in front of. Castiel hesitates, glancing at the motel door he knows Dean currently occupies, before curiosity gets the better of him and he's following the Time Lord.

When he rounds the bend, a blue Police Box is thrown in his face, the door ajar, top light aglow. His studies it, even reaching out his hand and grazing the wood with his fingertips, only half-surprised that it's so solid and real.

The Doctor sticks his head out. "You coming, or what?" Before disappearing back inside again.

Cass has heard about the TARDIS as much as the Doctor – that it's larger on the inside – and his mind is working through a series of differential equations and paradoxes as he steps over the threshold.

It's surprisingly warm, almost stuffy, and suffocating, and the weak (human) part of him wants to flee.

But the Doctor's actions pull his attention in to far to look away now. The Time Lord is bounding around in a circle, around the consoles, switching flips and pushing buttons, muttering words of encouragement. (Castiel is reminded of Dean's attachment to his car.)

The TARDIS shakes, and Cass grips a nearby pillar, blue eyes flown wide. "Where are we going?"

"Castiel, my friend." The Doctor pulls one last lever with a flourish. "We're going to save the world."