Sam Winchester's eyes burst over with pure black sclera; the Doctor cried out, then bit his lip as dark purple splotches of bruise welled over the skin of his wrist.
Then, thick black tentacles wriggled out between Sam's teeth, down from his nose, out from his ears, creeping like spiders under his skin.
"CAN YOU HEAR ME NOW? DOCTOR?" Shub Niggurath gurgled softly from Sam's mouth, licking Sam's lips with Sam's tongue, before switching to Sam's voice, "Dean, wake up! Hurry!"
The world began to cave in on itself, then, the arms of the couch twisting like a pretzel.
"Poisoned water, really, Shubby?" he murmured, unimpressed. "And by the way, Sam Winchester would never dare call his brother Princess. Dean! Now!"
A flurry of rock salt boomed from the doorway. Sam Winchestesr's possessed body staggered back, not at the impact, but at the sight of Dean Winchester with a shotgun and a grin.
Castiel stood in the other doorway, holding a mixing bowl and an empty box of borax, his trenchcoat drenched with slightly silvered water.
"Hey, Ass Butt!" the angel yelled, brandishing his bowl full of borax dough, "I just made a Hulu doll! Want to try it out?" He holds up a wet effigy, a 6 year old's idea of an octopus.
Dean stops a second to stare, his eyes gleaming with approving man tears.
"That's beautiful Cas, but it's actually houdoun, and shouldn't that be a vodoun doll? We want to banish this fucker, not fall in love with it! Hell, Cas! There's no time! Let's gank this douchebag!"
Resting for a moment on the couch, the Doctor met Castiel's gaze and then rose up, opening his mouth, letting his eyes glow with all his Timelord-y power.
"Let me add something to that doll, Cas- GACK!"
Sam's fist clenched on the Doctor's throat, just as the Time Lord began to blow a tiny mist of gold toward the little doughy octopus.
"Doctor!" Dean cried, throwing the emptied shotgun down.
Castiel reached out to grab the bit of gold mist, but Shub Niggurath caught it first, tossing it down Sam's throat like a last bite of pie as he tightened Sam's fingers around the Doctor's neck.
Dean ran toward the struggling Time Lord, shoulder down, like the star running back five yards from the goal.
But Shub Niggurath dodged the charge at the mast moment, and Dean sailed over the couch, headfirst into the wall- a knockout.
Then the Sam-thing turned, smiled, and threw the Doctor through the wall where Dean lay, the room where his daughter was sleeping.
"HERE'S LOOKING AT YOU, KID…" the Old One mused as it shoved a hand out and blew Castiel, and his borax octopus through two adjacent Vimana.
The angel went sailing over a random holy cow, straight into next week.
Then the Great Old One laughed as he picked up the golden sword and swallowed it whole, then stomped off into the baby's room.